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Testing NDB algorithm
NDB is almost the same as NDB, except that:
- The Primary / Secondary roles are controlled by a server variable
- Secondary I/U/D ops are 'reflected' back to the Secondary to handle
the delete vs delete limitations of NDB
This testcase provides some regression coverage w.r.t. NDB, by
running many of the same tests on NDB, but also switching
the cluster roles.
The main result differences w.r.t ndb_rpl_conflict_epoch.result are :
- Result file has 2 passes for different roles
- Master and Local server ids swapped in second run
- Delete-Delete-Insert (case 8) shows no divergence
Prior to including the generic NDB test files, we setup the
conflict role variables
Setup connections for use in this file
First we have Cluster A as Primary, Cluster B as Secondary
SET GLOBAL ndb_slave_conflict_role="PRIMARY";
SET GLOBAL ndb_slave_conflict_role="SECONDARY";
include/master-slave.inc
Warnings:
Note #### Sending passwords in plain text without SSL/TLS is extremely insecure.
Note #### Storing MySQL user name or password information in the master info repository is not secure and is therefore not recommended. Please consider using the USER and PASSWORD connection options for START SLAVE; see the 'START SLAVE Syntax' in the MySQL Manual for more information.
[connection master]
Setup circular replication
The circle is setup between Primary and Secondary
Setup ndb_replication and t1 exceptions table
Populate ndb_replication table as necessary
-- 0 extra gci bits
create table `test`.`t1$EX`
(server_id int unsigned,
master_server_id int unsigned,
master_epoch bigint unsigned,
count int unsigned,
a int not null,
d int,
primary key(server_id, master_server_id, master_epoch, count)) engine ndb;
Create table
create table test.t1(a int primary key, b varchar(255)) engine = ndb;
Create other table
create table test.t2(a int primary key, b int) engine = ndb;
----------------------------------
Test 1 : Basic two-way replication
----------------------------------
insert into test.t1 values (1, "Metropole");
FLUSH LOGS;
-- Verify that Max rep epoch has been updated
-- Primary Cluster Max Rep Epoch now beyond the original update epoch
-- Now update data on slave
update test.t1 set b="Favorit" where a=1;
-- Now check data on Primary
select * from test.t1 order by a;
a b
1 Favorit
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Now perform multiple consecutive updates on the Secondary
update test.t1 set b="Elephant house" where a=1;
update test.t1 set b="Beach house" where a=1;
select * from test.t1 order by a;
a b
1 Beach house
-- Now check they've applied on the Primary
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
--------------------------------------------
Test 2 : Normal Insert from Secondary Master
--------------------------------------------
-- Insert a new row on the Secondary
insert into test.t1 values (2, "Forrest");
-- Check it exists on the Primary
select * from test.t1 order by a;
a b
1 Beach house
2 Forrest
-- Update from the Secondary
update test.t1 set b="Reds" where a=2;
select * from test.t1 order by a;
a b
1 Beach house
2 Reds
delete from test.t1 where a=2;
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-------------------------------
Test 3 : Insert-Insert conflict
-------------------------------
stop slave;
-- Insert a row on the Primary Master
insert into test.t1 values (2, "Loopy Lornas");
-- Insert a row on the secondary Master
insert into test.t1 values (2, "Cloisters");
-- Examine data on Primary Master (should be unaffected)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-- Examine conflict indicators on Primary Master
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on isolated secondary Master (should be as-set)
select * from test.t1 order by a;
a b
1 Beach house
2 Cloisters
-- Restart secondary Masters slave
start slave;
-- Reexamine secondary Master's data (should be same as Primary Masters)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-------------------------------
Test 4 : Update-Update conflict
-------------------------------
-- Stop replication to secondary master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Peters Yard" where a=2;
-- Show data on Primary Master
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Update row on Secondary Master
update test.t1 set b="Toast" where a=2;
-- Examine data on Primary Master - should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on secondary - should be as set
select * from test.t1 order by a;
a b
1 Beach house
2 Toast
-- Now restart slave, will re-align row
start slave;
-- Check that Secondary is re-aligned
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
-------------------------------
Test 5 : Update-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Update on Primary Master
update test.t1 set b="Pear tree" where a = 2;
-- Delete on Secondary Master
delete from test.t1 where a = 2;
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
3
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, still missing
select * from test.t1 order by a;
a b
1 Beach house
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
-------------------------------
Test 6 : Delete-Update conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=2;
-- Update on Secondary Master
update test.t1 set b="Black pig" where a=2;
-- Examine data on Primary Master, should be unaffected (no row)
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, should be as inserted
select * from test.t1 order by a;
a b
1 Beach house
2 Black pig
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master (deleted)
select * from test.t1 order by a;
a b
1 Beach house
-------------------------------
Test 7 : Delete-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=1;
-- Delete on Secondary Master
delete from test.t1 where a=1;
-- Examine data on Primary Master, no row
select * from test.t1 order by a;
a b
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
5
ndb_epoch_delete_delete
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, no row
select * from test.t1 order by a;
a b
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, no row
select * from test.t1 order by a;
a b
------------------------------------------------
Test 8 : Delete-Delete, Insert conflict exposure
------------------------------------------------
-- Insert a row on Secondary Master
insert into test.t1 values (3, "Espy");
-- Check it's present on Primary Master
select * from test.t1 order by a;
a b
3 Espy
-- Stop replication in both directions
stop slave;
stop slave;
-- Delete row from both clusters
delete from test.t1 where a=3;
delete from test.t1 where a=3;
-- Follow up with Insert from Secondary master
insert into test.t1 values (3, "Dalriada");
-- Restart replication in both directions
start slave;
start slave;
-- Check data on both sites
-- diverged with NDB$EPOCH
-- consistent with NDB$EPOCH2
-- Secondary master :
select * from test.t1 order by a;
a b
3 Dalriada
-- Primary master :
select * from test.t1 order by a;
a b
3 Dalriada
--Remove extra row
delete from test.t1 where a=3;
-- Note that Delete-Delete conflict detected below
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
6
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
------------------------------------------------
Test 9 : Insert, Insert-Update-Delete conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Insert row on Primary Master
insert into test.t1 values (4, "Haymarket");
-- Insert row on Secondary Master
insert into test.t1 values (4, "Outhouse");
-- Update row on Secondary Master
update test.t1 set b="Mathers" where a = 4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Examine data (none) on Secondary Master
select * from test.t1 order by a;
a b
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Haymarket
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
9
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master (none)
select * from test.t1 order by a;
a b
-- Restart Secondary Master's slave
start slave;
-- Check data on Secondary Master, should be same as Primary Master
select * from test.t1;
a b
4 Haymarket
------------------------------------------------
Test 10 : Update, Delete-Insert-Update conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Blind poet" where a=4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Insert row on Secondary Master
insert into test.t1 values (4, "Drouthy Neebors");
-- Update row on Secondary Master
update test.t1 set b="The Tankard" where a=4;
-- Check data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on Secondary Master, as set
select * from test.t1 order by a;
a b
4 The Tankard
-- Restart Secondary Master slave
start slave;
-- Check data on Secondary Master - should be as Primary
select * from test.t1 order by a;
a b
4 Blind poet
------------------------------------------------------------------------
Test 11 : Test Secondary insert-update-delete accepted
------------------------------------------------------------------------
Insert row on Secondary
insert into test.t1 values (5, "Minders");
Update row on Secondary
update test.t1 set b="Southsider" where a=5;
Delete row on Secondary
delete from test.t1 where a=5;
Check data on Primary, should be none. No new conflicts
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
drop table test.t1;
drop table test.t2;
drop table test.t1$EX;
Populate ndb_replication table as necessary
-- 1 extra gci bits
create table `test`.`t1$EX`
(server_id int unsigned,
master_server_id int unsigned,
master_epoch bigint unsigned,
count int unsigned,
a int not null,
d int,
primary key(server_id, master_server_id, master_epoch, count)) engine ndb;
Create table
create table test.t1(a int primary key, b varchar(255)) engine = ndb;
Create other table
create table test.t2(a int primary key, b int) engine = ndb;
----------------------------------
Test 1 : Basic two-way replication
----------------------------------
insert into test.t1 values (1, "Metropole");
FLUSH LOGS;
-- Verify that Max rep epoch has been updated
-- Primary Cluster Max Rep Epoch now beyond the original update epoch
-- Now update data on slave
update test.t1 set b="Favorit" where a=1;
-- Now check data on Primary
select * from test.t1 order by a;
a b
1 Favorit
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Now perform multiple consecutive updates on the Secondary
update test.t1 set b="Elephant house" where a=1;
update test.t1 set b="Beach house" where a=1;
select * from test.t1 order by a;
a b
1 Beach house
-- Now check they've applied on the Primary
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
--------------------------------------------
Test 2 : Normal Insert from Secondary Master
--------------------------------------------
-- Insert a new row on the Secondary
insert into test.t1 values (2, "Forrest");
-- Check it exists on the Primary
select * from test.t1 order by a;
a b
1 Beach house
2 Forrest
-- Update from the Secondary
update test.t1 set b="Reds" where a=2;
select * from test.t1 order by a;
a b
1 Beach house
2 Reds
delete from test.t1 where a=2;
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-------------------------------
Test 3 : Insert-Insert conflict
-------------------------------
stop slave;
-- Insert a row on the Primary Master
insert into test.t1 values (2, "Loopy Lornas");
-- Insert a row on the secondary Master
insert into test.t1 values (2, "Cloisters");
-- Examine data on Primary Master (should be unaffected)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-- Examine conflict indicators on Primary Master
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on isolated secondary Master (should be as-set)
select * from test.t1 order by a;
a b
1 Beach house
2 Cloisters
-- Restart secondary Masters slave
start slave;
-- Reexamine secondary Master's data (should be same as Primary Masters)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-------------------------------
Test 4 : Update-Update conflict
-------------------------------
-- Stop replication to secondary master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Peters Yard" where a=2;
-- Show data on Primary Master
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Update row on Secondary Master
update test.t1 set b="Toast" where a=2;
-- Examine data on Primary Master - should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on secondary - should be as set
select * from test.t1 order by a;
a b
1 Beach house
2 Toast
-- Now restart slave, will re-align row
start slave;
-- Check that Secondary is re-aligned
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
-------------------------------
Test 5 : Update-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Update on Primary Master
update test.t1 set b="Pear tree" where a = 2;
-- Delete on Secondary Master
delete from test.t1 where a = 2;
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
3
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, still missing
select * from test.t1 order by a;
a b
1 Beach house
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
-------------------------------
Test 6 : Delete-Update conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=2;
-- Update on Secondary Master
update test.t1 set b="Black pig" where a=2;
-- Examine data on Primary Master, should be unaffected (no row)
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, should be as inserted
select * from test.t1 order by a;
a b
1 Beach house
2 Black pig
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master (deleted)
select * from test.t1 order by a;
a b
1 Beach house
-------------------------------
Test 7 : Delete-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=1;
-- Delete on Secondary Master
delete from test.t1 where a=1;
-- Examine data on Primary Master, no row
select * from test.t1 order by a;
a b
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
5
ndb_epoch_delete_delete
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, no row
select * from test.t1 order by a;
a b
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, no row
select * from test.t1 order by a;
a b
------------------------------------------------
Test 8 : Delete-Delete, Insert conflict exposure
------------------------------------------------
-- Insert a row on Secondary Master
insert into test.t1 values (3, "Espy");
-- Check it's present on Primary Master
select * from test.t1 order by a;
a b
3 Espy
-- Stop replication in both directions
stop slave;
stop slave;
-- Delete row from both clusters
delete from test.t1 where a=3;
delete from test.t1 where a=3;
-- Follow up with Insert from Secondary master
insert into test.t1 values (3, "Dalriada");
-- Restart replication in both directions
start slave;
start slave;
-- Check data on both sites
-- diverged with NDB$EPOCH
-- consistent with NDB$EPOCH2
-- Secondary master :
select * from test.t1 order by a;
a b
3 Dalriada
-- Primary master :
select * from test.t1 order by a;
a b
3 Dalriada
--Remove extra row
delete from test.t1 where a=3;
-- Note that Delete-Delete conflict detected below
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
6
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
------------------------------------------------
Test 9 : Insert, Insert-Update-Delete conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Insert row on Primary Master
insert into test.t1 values (4, "Haymarket");
-- Insert row on Secondary Master
insert into test.t1 values (4, "Outhouse");
-- Update row on Secondary Master
update test.t1 set b="Mathers" where a = 4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Examine data (none) on Secondary Master
select * from test.t1 order by a;
a b
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Haymarket
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
9
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master (none)
select * from test.t1 order by a;
a b
-- Restart Secondary Master's slave
start slave;
-- Check data on Secondary Master, should be same as Primary Master
select * from test.t1;
a b
4 Haymarket
------------------------------------------------
Test 10 : Update, Delete-Insert-Update conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Blind poet" where a=4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Insert row on Secondary Master
insert into test.t1 values (4, "Drouthy Neebors");
-- Update row on Secondary Master
update test.t1 set b="The Tankard" where a=4;
-- Check data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on Secondary Master, as set
select * from test.t1 order by a;
a b
4 The Tankard
-- Restart Secondary Master slave
start slave;
-- Check data on Secondary Master - should be as Primary
select * from test.t1 order by a;
a b
4 Blind poet
------------------------------------------------------------------------
Test 11 : Test Secondary insert-update-delete accepted
------------------------------------------------------------------------
Insert row on Secondary
insert into test.t1 values (5, "Minders");
Update row on Secondary
update test.t1 set b="Southsider" where a=5;
Delete row on Secondary
delete from test.t1 where a=5;
Check data on Primary, should be none. No new conflicts
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
drop table test.t1;
drop table test.t2;
drop table test.t1$EX;
Populate ndb_replication table as necessary
-- 31 extra gci bits
create table `test`.`t1$EX`
(server_id int unsigned,
master_server_id int unsigned,
master_epoch bigint unsigned,
count int unsigned,
a int not null,
d int,
primary key(server_id, master_server_id, master_epoch, count)) engine ndb;
Create table
create table test.t1(a int primary key, b varchar(255)) engine = ndb;
Create other table
create table test.t2(a int primary key, b int) engine = ndb;
----------------------------------
Test 1 : Basic two-way replication
----------------------------------
insert into test.t1 values (1, "Metropole");
FLUSH LOGS;
-- Verify that Max rep epoch has been updated
-- Primary Cluster Max Rep Epoch now beyond the original update epoch
-- Now update data on slave
update test.t1 set b="Favorit" where a=1;
-- Now check data on Primary
select * from test.t1 order by a;
a b
1 Favorit
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Now perform multiple consecutive updates on the Secondary
update test.t1 set b="Elephant house" where a=1;
update test.t1 set b="Beach house" where a=1;
select * from test.t1 order by a;
a b
1 Beach house
-- Now check they've applied on the Primary
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
--------------------------------------------
Test 2 : Normal Insert from Secondary Master
--------------------------------------------
-- Insert a new row on the Secondary
insert into test.t1 values (2, "Forrest");
-- Check it exists on the Primary
select * from test.t1 order by a;
a b
1 Beach house
2 Forrest
-- Update from the Secondary
update test.t1 set b="Reds" where a=2;
select * from test.t1 order by a;
a b
1 Beach house
2 Reds
delete from test.t1 where a=2;
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-------------------------------
Test 3 : Insert-Insert conflict
-------------------------------
stop slave;
-- Insert a row on the Primary Master
insert into test.t1 values (2, "Loopy Lornas");
-- Insert a row on the secondary Master
insert into test.t1 values (2, "Cloisters");
-- Examine data on Primary Master (should be unaffected)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-- Examine conflict indicators on Primary Master
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on isolated secondary Master (should be as-set)
select * from test.t1 order by a;
a b
1 Beach house
2 Cloisters
-- Restart secondary Masters slave
start slave;
-- Reexamine secondary Master's data (should be same as Primary Masters)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-------------------------------
Test 4 : Update-Update conflict
-------------------------------
-- Stop replication to secondary master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Peters Yard" where a=2;
-- Show data on Primary Master
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Update row on Secondary Master
update test.t1 set b="Toast" where a=2;
-- Examine data on Primary Master - should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on secondary - should be as set
select * from test.t1 order by a;
a b
1 Beach house
2 Toast
-- Now restart slave, will re-align row
start slave;
-- Check that Secondary is re-aligned
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
-------------------------------
Test 5 : Update-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Update on Primary Master
update test.t1 set b="Pear tree" where a = 2;
-- Delete on Secondary Master
delete from test.t1 where a = 2;
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
3
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, still missing
select * from test.t1 order by a;
a b
1 Beach house
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
-------------------------------
Test 6 : Delete-Update conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=2;
-- Update on Secondary Master
update test.t1 set b="Black pig" where a=2;
-- Examine data on Primary Master, should be unaffected (no row)
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, should be as inserted
select * from test.t1 order by a;
a b
1 Beach house
2 Black pig
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master (deleted)
select * from test.t1 order by a;
a b
1 Beach house
-------------------------------
Test 7 : Delete-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=1;
-- Delete on Secondary Master
delete from test.t1 where a=1;
-- Examine data on Primary Master, no row
select * from test.t1 order by a;
a b
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
5
ndb_epoch_delete_delete
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, no row
select * from test.t1 order by a;
a b
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, no row
select * from test.t1 order by a;
a b
------------------------------------------------
Test 8 : Delete-Delete, Insert conflict exposure
------------------------------------------------
-- Insert a row on Secondary Master
insert into test.t1 values (3, "Espy");
-- Check it's present on Primary Master
select * from test.t1 order by a;
a b
3 Espy
-- Stop replication in both directions
stop slave;
stop slave;
-- Delete row from both clusters
delete from test.t1 where a=3;
delete from test.t1 where a=3;
-- Follow up with Insert from Secondary master
insert into test.t1 values (3, "Dalriada");
-- Restart replication in both directions
start slave;
start slave;
-- Check data on both sites
-- diverged with NDB$EPOCH
-- consistent with NDB$EPOCH2
-- Secondary master :
select * from test.t1 order by a;
a b
3 Dalriada
-- Primary master :
select * from test.t1 order by a;
a b
3 Dalriada
--Remove extra row
delete from test.t1 where a=3;
-- Note that Delete-Delete conflict detected below
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
6
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
------------------------------------------------
Test 9 : Insert, Insert-Update-Delete conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Insert row on Primary Master
insert into test.t1 values (4, "Haymarket");
-- Insert row on Secondary Master
insert into test.t1 values (4, "Outhouse");
-- Update row on Secondary Master
update test.t1 set b="Mathers" where a = 4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Examine data (none) on Secondary Master
select * from test.t1 order by a;
a b
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Haymarket
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
9
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master (none)
select * from test.t1 order by a;
a b
-- Restart Secondary Master's slave
start slave;
-- Check data on Secondary Master, should be same as Primary Master
select * from test.t1;
a b
4 Haymarket
------------------------------------------------
Test 10 : Update, Delete-Insert-Update conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Blind poet" where a=4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Insert row on Secondary Master
insert into test.t1 values (4, "Drouthy Neebors");
-- Update row on Secondary Master
update test.t1 set b="The Tankard" where a=4;
-- Check data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on Secondary Master, as set
select * from test.t1 order by a;
a b
4 The Tankard
-- Restart Secondary Master slave
start slave;
-- Check data on Secondary Master - should be as Primary
select * from test.t1 order by a;
a b
4 Blind poet
------------------------------------------------------------------------
Test 11 : Test Secondary insert-update-delete accepted
------------------------------------------------------------------------
Insert row on Secondary
insert into test.t1 values (5, "Minders");
Update row on Secondary
update test.t1 set b="Southsider" where a=5;
Delete row on Secondary
delete from test.t1 where a=5;
Check data on Primary, should be none. No new conflicts
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
drop table test.t1;
drop table test.t2;
drop table test.t1$EX;
Populate ndb_replication table as necessary
-- Default extra Gci bits
create table `test`.`t1$EX`
(server_id int unsigned,
master_server_id int unsigned,
master_epoch bigint unsigned,
count int unsigned,
a int not null,
d int,
primary key(server_id, master_server_id, master_epoch, count)) engine ndb;
Create table
create table test.t1(a int primary key, b varchar(255)) engine = ndb;
Create other table
create table test.t2(a int primary key, b int) engine = ndb;
----------------------------------
Test 1 : Basic two-way replication
----------------------------------
insert into test.t1 values (1, "Metropole");
FLUSH LOGS;
-- Verify that Max rep epoch has been updated
-- Primary Cluster Max Rep Epoch now beyond the original update epoch
-- Now update data on slave
update test.t1 set b="Favorit" where a=1;
-- Now check data on Primary
select * from test.t1 order by a;
a b
1 Favorit
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Now perform multiple consecutive updates on the Secondary
update test.t1 set b="Elephant house" where a=1;
update test.t1 set b="Beach house" where a=1;
select * from test.t1 order by a;
a b
1 Beach house
-- Now check they've applied on the Primary
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
--------------------------------------------
Test 2 : Normal Insert from Secondary Master
--------------------------------------------
-- Insert a new row on the Secondary
insert into test.t1 values (2, "Forrest");
-- Check it exists on the Primary
select * from test.t1 order by a;
a b
1 Beach house
2 Forrest
-- Update from the Secondary
update test.t1 set b="Reds" where a=2;
select * from test.t1 order by a;
a b
1 Beach house
2 Reds
delete from test.t1 where a=2;
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-------------------------------
Test 3 : Insert-Insert conflict
-------------------------------
stop slave;
-- Insert a row on the Primary Master
insert into test.t1 values (2, "Loopy Lornas");
-- Insert a row on the secondary Master
insert into test.t1 values (2, "Cloisters");
-- Examine data on Primary Master (should be unaffected)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-- Examine conflict indicators on Primary Master
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on isolated secondary Master (should be as-set)
select * from test.t1 order by a;
a b
1 Beach house
2 Cloisters
-- Restart secondary Masters slave
start slave;
-- Reexamine secondary Master's data (should be same as Primary Masters)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-------------------------------
Test 4 : Update-Update conflict
-------------------------------
-- Stop replication to secondary master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Peters Yard" where a=2;
-- Show data on Primary Master
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Update row on Secondary Master
update test.t1 set b="Toast" where a=2;
-- Examine data on Primary Master - should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on secondary - should be as set
select * from test.t1 order by a;
a b
1 Beach house
2 Toast
-- Now restart slave, will re-align row
start slave;
-- Check that Secondary is re-aligned
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
-------------------------------
Test 5 : Update-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Update on Primary Master
update test.t1 set b="Pear tree" where a = 2;
-- Delete on Secondary Master
delete from test.t1 where a = 2;
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
3
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, still missing
select * from test.t1 order by a;
a b
1 Beach house
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
-------------------------------
Test 6 : Delete-Update conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=2;
-- Update on Secondary Master
update test.t1 set b="Black pig" where a=2;
-- Examine data on Primary Master, should be unaffected (no row)
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, should be as inserted
select * from test.t1 order by a;
a b
1 Beach house
2 Black pig
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master (deleted)
select * from test.t1 order by a;
a b
1 Beach house
-------------------------------
Test 7 : Delete-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=1;
-- Delete on Secondary Master
delete from test.t1 where a=1;
-- Examine data on Primary Master, no row
select * from test.t1 order by a;
a b
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
5
ndb_epoch_delete_delete
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, no row
select * from test.t1 order by a;
a b
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, no row
select * from test.t1 order by a;
a b
------------------------------------------------
Test 8 : Delete-Delete, Insert conflict exposure
------------------------------------------------
-- Insert a row on Secondary Master
insert into test.t1 values (3, "Espy");
-- Check it's present on Primary Master
select * from test.t1 order by a;
a b
3 Espy
-- Stop replication in both directions
stop slave;
stop slave;
-- Delete row from both clusters
delete from test.t1 where a=3;
delete from test.t1 where a=3;
-- Follow up with Insert from Secondary master
insert into test.t1 values (3, "Dalriada");
-- Restart replication in both directions
start slave;
start slave;
-- Check data on both sites
-- diverged with NDB$EPOCH
-- consistent with NDB$EPOCH2
-- Secondary master :
select * from test.t1 order by a;
a b
3 Dalriada
-- Primary master :
select * from test.t1 order by a;
a b
3 Dalriada
--Remove extra row
delete from test.t1 where a=3;
-- Note that Delete-Delete conflict detected below
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
6
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
------------------------------------------------
Test 9 : Insert, Insert-Update-Delete conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Insert row on Primary Master
insert into test.t1 values (4, "Haymarket");
-- Insert row on Secondary Master
insert into test.t1 values (4, "Outhouse");
-- Update row on Secondary Master
update test.t1 set b="Mathers" where a = 4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Examine data (none) on Secondary Master
select * from test.t1 order by a;
a b
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Haymarket
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
9
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master (none)
select * from test.t1 order by a;
a b
-- Restart Secondary Master's slave
start slave;
-- Check data on Secondary Master, should be same as Primary Master
select * from test.t1;
a b
4 Haymarket
------------------------------------------------
Test 10 : Update, Delete-Insert-Update conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Blind poet" where a=4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Insert row on Secondary Master
insert into test.t1 values (4, "Drouthy Neebors");
-- Update row on Secondary Master
update test.t1 set b="The Tankard" where a=4;
-- Check data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on Secondary Master, as set
select * from test.t1 order by a;
a b
4 The Tankard
-- Restart Secondary Master slave
start slave;
-- Check data on Secondary Master - should be as Primary
select * from test.t1 order by a;
a b
4 Blind poet
------------------------------------------------------------------------
Test 11 : Test Secondary insert-update-delete accepted
------------------------------------------------------------------------
Insert row on Secondary
insert into test.t1 values (5, "Minders");
Update row on Secondary
update test.t1 set b="Southsider" where a=5;
Delete row on Secondary
delete from test.t1 where a=5;
Check data on Primary, should be none. No new conflicts
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
1 3 # 1 # #
1 3 # 2 # #
1 3 # 3 # #
1 3 # 4 # #
1 3 # 5 # #
1 3 # 6 # #
1 3 # 7 # #
1 3 # 8 # #
1 3 # 9 # #
1 3 # 10 # #
1 3 # 11 # #
1 3 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
1 3 # # 1 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 2 NULL
1 3 # # 3 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
1 3 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
drop table test.t1;
drop table test.t2;
drop table test.t1$EX;
Now test batched conflict detection/handling
create table test.t1 (
a int primary key,
b int,
c varchar(2000)) engine=ndb;
-- Stop replication from Primary -> Secondary
stop slave;
-- Insert a row on Primary
insert into test.t1 values (1,1,repeat('B', 2000));
-- Generate a large batch of inserts with early + late conflicts
create procedure test.doit (rows int)
begin
set @x = 0;
START TRANSACTION;
repeat
insert into test.t1 values (@x, @x, repeat('B', 2000));
set @x = @x + 1;
until @x = rows
end repeat;
COMMIT;
START TRANSACTION;
update test.t1 set b=999, c=repeat('E',2000) where a=1;
COMMIT;
START TRANSACTION;
delete from test.t1 where a=1;
COMMIT;
START TRANSACTION;
insert into test.t1 values (1,1,'A');
COMMIT;
end%
call test.doit(100);
drop procedure test.doit;
-- Look at Primary status, expect 4 conflicts
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t1$EX` ORDER BY a, d;
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
start slave;
-- Look at Seconday row
select a,b,sha1(c) from test.t1 where a=1;
a b sha1(c)
1 1 6d41e1d402596dff36396d1f0f288d17a4b9800a
-- Check it's the same on the Secondary
select a,b,sha1(c) from test.t1 where a=1;
a b sha1(c)
1 1 6d41e1d402596dff36396d1f0f288d17a4b9800a
Test batching of DELETE vs DELETE with following INSERT
delete from test.t1;
insert into test.t1 values (1, 1, "Ma Brows");
-- Stop Slave in both directions
stop slave;
stop slave;
-- Delete row on Primary Cluster
delete from test.t1 where a=1;
-- Delete row on Secondary Cluster, followed by Insert in later 'batch'
create procedure test.doit (rows int)
begin
set @x = 2;
START TRANSACTION;
delete from test.t1 where a=1;
repeat
insert into test.t1 values (@x, @x, repeat('B', 2000));
set @x = @x + 1;
until @x = (rows + 2)
end repeat;
COMMIT;
START TRANSACTION;
insert into test.t1 values (1, 1, 'Malleny arms');
COMMIT;
end%
call test.doit(200);
-- Restart slave on Primary Cluster
start slave;
-- Show data on Primary Cluster (should have row inserted on Secondary)
select * from test.t1 where a=1;
a b c
1 1 Malleny arms
-- Show data on Secondary Cluster (should have row inserted on Secondary)
select * from test.t1 where a=1;
a b c
1 1 Malleny arms
--Restart slave on Secondary Cluster
start slave;
-- Show data on Clusters after slaves restarted+synced
For NDB$EPOCH, the data will be missing
as expected with delete vs delete conflict
followed closely by Insert
For NDB$EPOCH2, the data will be present on both
clusters.
PRIMARY
select * from test.t1 where a=1;
a b c
1 1 Malleny arms
SECONDARY
select * from test.t1 where a=1;
a b c
1 1 Malleny arms
-- Force wait for master to be in-sync with slave
To avoid race between DML and table drop
flush logs;
drop procedure test.doit;
drop table test.t1;
delete from mysql.ndb_replication;
insert into mysql.ndb_replication values
("test", "t3", 0, 7, "NDB$EPOCH2(32)"),
("test", "t4", 0, 7, "NDB$EPOCH2(-1)");
create table test.t3 (a int primary key) engine=ndb;
ERROR HY000: Got error 1626 'Unknown error code' from NDBCLUSTER
show warnings;
Level Code Message
Warning 1626 Error in parsing conflict function. Message: NDB$EPOCH2(32), Too many extra Gci bits at ')'
Error 1296 Got error 1626 'Unknown error code' from NDBCLUSTER
create table test.t4 (a int primary key) engine=ndb;
ERROR HY000: Got error 1626 'Unknown error code' from NDBCLUSTER
show warnings;
Level Code Message
Warning 1626 Error in parsing conflict function. Message: NDB$EPOCH2(-1), Too many extra Gci bits at ')'
Error 1296 Got error 1626 'Unknown error code' from NDBCLUSTER
-- Force sync before dropping table to avoid race
flush logs;
flush logs;
drop table mysql.ndb_replication;
-- Attempt to get system back in pre-test state
stop slave;
reset slave;
include/rpl_end.inc
Next we have Cluster A as Secondary, Cluster B as Primary
SET GLOBAL ndb_slave_conflict_role="NONE";
SET GLOBAL ndb_slave_conflict_role="SECONDARY";
SET GLOBAL ndb_slave_conflict_role="NONE";
SET GLOBAL ndb_slave_conflict_role="PRIMARY";
We set a special control var to allow the generic scripts
to handle this topology
Remove some connections which can't be setup twice (ugly)
include/master-slave.inc [rpl_server_count=2]
Warnings:
Note #### Sending passwords in plain text without SSL/TLS is extremely insecure.
Note #### Storing MySQL user name or password information in the master info repository is not secure and is therefore not recommended. Please consider using the USER and PASSWORD connection options for START SLAVE; see the 'START SLAVE Syntax' in the MySQL Manual for more information.
[connection master]
Setup circular replication
The circle is setup between Primary and Secondary
Setup ndb_replication and t1 exceptions table
Populate ndb_replication table as necessary
-- 0 extra gci bits
create table `test`.`t1$EX`
(server_id int unsigned,
master_server_id int unsigned,
master_epoch bigint unsigned,
count int unsigned,
a int not null,
d int,
primary key(server_id, master_server_id, master_epoch, count)) engine ndb;
Create table
create table test.t1(a int primary key, b varchar(255)) engine = ndb;
Create other table
create table test.t2(a int primary key, b int) engine = ndb;
----------------------------------
Test 1 : Basic two-way replication
----------------------------------
insert into test.t1 values (1, "Metropole");
FLUSH LOGS;
-- Verify that Max rep epoch has been updated
-- Primary Cluster Max Rep Epoch now beyond the original update epoch
-- Now update data on slave
update test.t1 set b="Favorit" where a=1;
-- Now check data on Primary
select * from test.t1 order by a;
a b
1 Favorit
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Now perform multiple consecutive updates on the Secondary
update test.t1 set b="Elephant house" where a=1;
update test.t1 set b="Beach house" where a=1;
select * from test.t1 order by a;
a b
1 Beach house
-- Now check they've applied on the Primary
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
--------------------------------------------
Test 2 : Normal Insert from Secondary Master
--------------------------------------------
-- Insert a new row on the Secondary
insert into test.t1 values (2, "Forrest");
-- Check it exists on the Primary
select * from test.t1 order by a;
a b
1 Beach house
2 Forrest
-- Update from the Secondary
update test.t1 set b="Reds" where a=2;
select * from test.t1 order by a;
a b
1 Beach house
2 Reds
delete from test.t1 where a=2;
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-------------------------------
Test 3 : Insert-Insert conflict
-------------------------------
stop slave;
-- Insert a row on the Primary Master
insert into test.t1 values (2, "Loopy Lornas");
-- Insert a row on the secondary Master
insert into test.t1 values (2, "Cloisters");
-- Examine data on Primary Master (should be unaffected)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-- Examine conflict indicators on Primary Master
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on isolated secondary Master (should be as-set)
select * from test.t1 order by a;
a b
1 Beach house
2 Cloisters
-- Restart secondary Masters slave
start slave;
-- Reexamine secondary Master's data (should be same as Primary Masters)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-------------------------------
Test 4 : Update-Update conflict
-------------------------------
-- Stop replication to secondary master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Peters Yard" where a=2;
-- Show data on Primary Master
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Update row on Secondary Master
update test.t1 set b="Toast" where a=2;
-- Examine data on Primary Master - should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on secondary - should be as set
select * from test.t1 order by a;
a b
1 Beach house
2 Toast
-- Now restart slave, will re-align row
start slave;
-- Check that Secondary is re-aligned
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
-------------------------------
Test 5 : Update-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Update on Primary Master
update test.t1 set b="Pear tree" where a = 2;
-- Delete on Secondary Master
delete from test.t1 where a = 2;
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
3
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, still missing
select * from test.t1 order by a;
a b
1 Beach house
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
-------------------------------
Test 6 : Delete-Update conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=2;
-- Update on Secondary Master
update test.t1 set b="Black pig" where a=2;
-- Examine data on Primary Master, should be unaffected (no row)
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, should be as inserted
select * from test.t1 order by a;
a b
1 Beach house
2 Black pig
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master (deleted)
select * from test.t1 order by a;
a b
1 Beach house
-------------------------------
Test 7 : Delete-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=1;
-- Delete on Secondary Master
delete from test.t1 where a=1;
-- Examine data on Primary Master, no row
select * from test.t1 order by a;
a b
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
5
ndb_epoch_delete_delete
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, no row
select * from test.t1 order by a;
a b
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, no row
select * from test.t1 order by a;
a b
------------------------------------------------
Test 8 : Delete-Delete, Insert conflict exposure
------------------------------------------------
-- Insert a row on Secondary Master
insert into test.t1 values (3, "Espy");
-- Check it's present on Primary Master
select * from test.t1 order by a;
a b
3 Espy
-- Stop replication in both directions
stop slave;
stop slave;
-- Delete row from both clusters
delete from test.t1 where a=3;
delete from test.t1 where a=3;
-- Follow up with Insert from Secondary master
insert into test.t1 values (3, "Dalriada");
-- Restart replication in both directions
start slave;
start slave;
-- Check data on both sites
-- diverged with NDB$EPOCH
-- consistent with NDB$EPOCH2
-- Secondary master :
select * from test.t1 order by a;
a b
3 Dalriada
-- Primary master :
select * from test.t1 order by a;
a b
3 Dalriada
--Remove extra row
delete from test.t1 where a=3;
-- Note that Delete-Delete conflict detected below
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
6
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
------------------------------------------------
Test 9 : Insert, Insert-Update-Delete conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Insert row on Primary Master
insert into test.t1 values (4, "Haymarket");
-- Insert row on Secondary Master
insert into test.t1 values (4, "Outhouse");
-- Update row on Secondary Master
update test.t1 set b="Mathers" where a = 4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Examine data (none) on Secondary Master
select * from test.t1 order by a;
a b
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Haymarket
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
9
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master (none)
select * from test.t1 order by a;
a b
-- Restart Secondary Master's slave
start slave;
-- Check data on Secondary Master, should be same as Primary Master
select * from test.t1;
a b
4 Haymarket
------------------------------------------------
Test 10 : Update, Delete-Insert-Update conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Blind poet" where a=4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Insert row on Secondary Master
insert into test.t1 values (4, "Drouthy Neebors");
-- Update row on Secondary Master
update test.t1 set b="The Tankard" where a=4;
-- Check data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on Secondary Master, as set
select * from test.t1 order by a;
a b
4 The Tankard
-- Restart Secondary Master slave
start slave;
-- Check data on Secondary Master - should be as Primary
select * from test.t1 order by a;
a b
4 Blind poet
------------------------------------------------------------------------
Test 11 : Test Secondary insert-update-delete accepted
------------------------------------------------------------------------
Insert row on Secondary
insert into test.t1 values (5, "Minders");
Update row on Secondary
update test.t1 set b="Southsider" where a=5;
Delete row on Secondary
delete from test.t1 where a=5;
Check data on Primary, should be none. No new conflicts
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
drop table test.t1;
drop table test.t2;
drop table test.t1$EX;
Populate ndb_replication table as necessary
-- 1 extra gci bits
create table `test`.`t1$EX`
(server_id int unsigned,
master_server_id int unsigned,
master_epoch bigint unsigned,
count int unsigned,
a int not null,
d int,
primary key(server_id, master_server_id, master_epoch, count)) engine ndb;
Create table
create table test.t1(a int primary key, b varchar(255)) engine = ndb;
Create other table
create table test.t2(a int primary key, b int) engine = ndb;
----------------------------------
Test 1 : Basic two-way replication
----------------------------------
insert into test.t1 values (1, "Metropole");
FLUSH LOGS;
-- Verify that Max rep epoch has been updated
-- Primary Cluster Max Rep Epoch now beyond the original update epoch
-- Now update data on slave
update test.t1 set b="Favorit" where a=1;
-- Now check data on Primary
select * from test.t1 order by a;
a b
1 Favorit
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Now perform multiple consecutive updates on the Secondary
update test.t1 set b="Elephant house" where a=1;
update test.t1 set b="Beach house" where a=1;
select * from test.t1 order by a;
a b
1 Beach house
-- Now check they've applied on the Primary
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
--------------------------------------------
Test 2 : Normal Insert from Secondary Master
--------------------------------------------
-- Insert a new row on the Secondary
insert into test.t1 values (2, "Forrest");
-- Check it exists on the Primary
select * from test.t1 order by a;
a b
1 Beach house
2 Forrest
-- Update from the Secondary
update test.t1 set b="Reds" where a=2;
select * from test.t1 order by a;
a b
1 Beach house
2 Reds
delete from test.t1 where a=2;
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-------------------------------
Test 3 : Insert-Insert conflict
-------------------------------
stop slave;
-- Insert a row on the Primary Master
insert into test.t1 values (2, "Loopy Lornas");
-- Insert a row on the secondary Master
insert into test.t1 values (2, "Cloisters");
-- Examine data on Primary Master (should be unaffected)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-- Examine conflict indicators on Primary Master
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on isolated secondary Master (should be as-set)
select * from test.t1 order by a;
a b
1 Beach house
2 Cloisters
-- Restart secondary Masters slave
start slave;
-- Reexamine secondary Master's data (should be same as Primary Masters)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-------------------------------
Test 4 : Update-Update conflict
-------------------------------
-- Stop replication to secondary master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Peters Yard" where a=2;
-- Show data on Primary Master
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Update row on Secondary Master
update test.t1 set b="Toast" where a=2;
-- Examine data on Primary Master - should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on secondary - should be as set
select * from test.t1 order by a;
a b
1 Beach house
2 Toast
-- Now restart slave, will re-align row
start slave;
-- Check that Secondary is re-aligned
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
-------------------------------
Test 5 : Update-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Update on Primary Master
update test.t1 set b="Pear tree" where a = 2;
-- Delete on Secondary Master
delete from test.t1 where a = 2;
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
3
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, still missing
select * from test.t1 order by a;
a b
1 Beach house
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
-------------------------------
Test 6 : Delete-Update conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=2;
-- Update on Secondary Master
update test.t1 set b="Black pig" where a=2;
-- Examine data on Primary Master, should be unaffected (no row)
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, should be as inserted
select * from test.t1 order by a;
a b
1 Beach house
2 Black pig
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master (deleted)
select * from test.t1 order by a;
a b
1 Beach house
-------------------------------
Test 7 : Delete-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=1;
-- Delete on Secondary Master
delete from test.t1 where a=1;
-- Examine data on Primary Master, no row
select * from test.t1 order by a;
a b
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
5
ndb_epoch_delete_delete
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, no row
select * from test.t1 order by a;
a b
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, no row
select * from test.t1 order by a;
a b
------------------------------------------------
Test 8 : Delete-Delete, Insert conflict exposure
------------------------------------------------
-- Insert a row on Secondary Master
insert into test.t1 values (3, "Espy");
-- Check it's present on Primary Master
select * from test.t1 order by a;
a b
3 Espy
-- Stop replication in both directions
stop slave;
stop slave;
-- Delete row from both clusters
delete from test.t1 where a=3;
delete from test.t1 where a=3;
-- Follow up with Insert from Secondary master
insert into test.t1 values (3, "Dalriada");
-- Restart replication in both directions
start slave;
start slave;
-- Check data on both sites
-- diverged with NDB$EPOCH
-- consistent with NDB$EPOCH2
-- Secondary master :
select * from test.t1 order by a;
a b
3 Dalriada
-- Primary master :
select * from test.t1 order by a;
a b
3 Dalriada
--Remove extra row
delete from test.t1 where a=3;
-- Note that Delete-Delete conflict detected below
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
6
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
------------------------------------------------
Test 9 : Insert, Insert-Update-Delete conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Insert row on Primary Master
insert into test.t1 values (4, "Haymarket");
-- Insert row on Secondary Master
insert into test.t1 values (4, "Outhouse");
-- Update row on Secondary Master
update test.t1 set b="Mathers" where a = 4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Examine data (none) on Secondary Master
select * from test.t1 order by a;
a b
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Haymarket
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
9
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master (none)
select * from test.t1 order by a;
a b
-- Restart Secondary Master's slave
start slave;
-- Check data on Secondary Master, should be same as Primary Master
select * from test.t1;
a b
4 Haymarket
------------------------------------------------
Test 10 : Update, Delete-Insert-Update conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Blind poet" where a=4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Insert row on Secondary Master
insert into test.t1 values (4, "Drouthy Neebors");
-- Update row on Secondary Master
update test.t1 set b="The Tankard" where a=4;
-- Check data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on Secondary Master, as set
select * from test.t1 order by a;
a b
4 The Tankard
-- Restart Secondary Master slave
start slave;
-- Check data on Secondary Master - should be as Primary
select * from test.t1 order by a;
a b
4 Blind poet
------------------------------------------------------------------------
Test 11 : Test Secondary insert-update-delete accepted
------------------------------------------------------------------------
Insert row on Secondary
insert into test.t1 values (5, "Minders");
Update row on Secondary
update test.t1 set b="Southsider" where a=5;
Delete row on Secondary
delete from test.t1 where a=5;
Check data on Primary, should be none. No new conflicts
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
drop table test.t1;
drop table test.t2;
drop table test.t1$EX;
Populate ndb_replication table as necessary
-- 31 extra gci bits
create table `test`.`t1$EX`
(server_id int unsigned,
master_server_id int unsigned,
master_epoch bigint unsigned,
count int unsigned,
a int not null,
d int,
primary key(server_id, master_server_id, master_epoch, count)) engine ndb;
Create table
create table test.t1(a int primary key, b varchar(255)) engine = ndb;
Create other table
create table test.t2(a int primary key, b int) engine = ndb;
----------------------------------
Test 1 : Basic two-way replication
----------------------------------
insert into test.t1 values (1, "Metropole");
FLUSH LOGS;
-- Verify that Max rep epoch has been updated
-- Primary Cluster Max Rep Epoch now beyond the original update epoch
-- Now update data on slave
update test.t1 set b="Favorit" where a=1;
-- Now check data on Primary
select * from test.t1 order by a;
a b
1 Favorit
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Now perform multiple consecutive updates on the Secondary
update test.t1 set b="Elephant house" where a=1;
update test.t1 set b="Beach house" where a=1;
select * from test.t1 order by a;
a b
1 Beach house
-- Now check they've applied on the Primary
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
--------------------------------------------
Test 2 : Normal Insert from Secondary Master
--------------------------------------------
-- Insert a new row on the Secondary
insert into test.t1 values (2, "Forrest");
-- Check it exists on the Primary
select * from test.t1 order by a;
a b
1 Beach house
2 Forrest
-- Update from the Secondary
update test.t1 set b="Reds" where a=2;
select * from test.t1 order by a;
a b
1 Beach house
2 Reds
delete from test.t1 where a=2;
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-------------------------------
Test 3 : Insert-Insert conflict
-------------------------------
stop slave;
-- Insert a row on the Primary Master
insert into test.t1 values (2, "Loopy Lornas");
-- Insert a row on the secondary Master
insert into test.t1 values (2, "Cloisters");
-- Examine data on Primary Master (should be unaffected)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-- Examine conflict indicators on Primary Master
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on isolated secondary Master (should be as-set)
select * from test.t1 order by a;
a b
1 Beach house
2 Cloisters
-- Restart secondary Masters slave
start slave;
-- Reexamine secondary Master's data (should be same as Primary Masters)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-------------------------------
Test 4 : Update-Update conflict
-------------------------------
-- Stop replication to secondary master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Peters Yard" where a=2;
-- Show data on Primary Master
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Update row on Secondary Master
update test.t1 set b="Toast" where a=2;
-- Examine data on Primary Master - should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on secondary - should be as set
select * from test.t1 order by a;
a b
1 Beach house
2 Toast
-- Now restart slave, will re-align row
start slave;
-- Check that Secondary is re-aligned
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
-------------------------------
Test 5 : Update-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Update on Primary Master
update test.t1 set b="Pear tree" where a = 2;
-- Delete on Secondary Master
delete from test.t1 where a = 2;
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
3
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, still missing
select * from test.t1 order by a;
a b
1 Beach house
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
-------------------------------
Test 6 : Delete-Update conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=2;
-- Update on Secondary Master
update test.t1 set b="Black pig" where a=2;
-- Examine data on Primary Master, should be unaffected (no row)
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, should be as inserted
select * from test.t1 order by a;
a b
1 Beach house
2 Black pig
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master (deleted)
select * from test.t1 order by a;
a b
1 Beach house
-------------------------------
Test 7 : Delete-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=1;
-- Delete on Secondary Master
delete from test.t1 where a=1;
-- Examine data on Primary Master, no row
select * from test.t1 order by a;
a b
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
5
ndb_epoch_delete_delete
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, no row
select * from test.t1 order by a;
a b
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, no row
select * from test.t1 order by a;
a b
------------------------------------------------
Test 8 : Delete-Delete, Insert conflict exposure
------------------------------------------------
-- Insert a row on Secondary Master
insert into test.t1 values (3, "Espy");
-- Check it's present on Primary Master
select * from test.t1 order by a;
a b
3 Espy
-- Stop replication in both directions
stop slave;
stop slave;
-- Delete row from both clusters
delete from test.t1 where a=3;
delete from test.t1 where a=3;
-- Follow up with Insert from Secondary master
insert into test.t1 values (3, "Dalriada");
-- Restart replication in both directions
start slave;
start slave;
-- Check data on both sites
-- diverged with NDB$EPOCH
-- consistent with NDB$EPOCH2
-- Secondary master :
select * from test.t1 order by a;
a b
3 Dalriada
-- Primary master :
select * from test.t1 order by a;
a b
3 Dalriada
--Remove extra row
delete from test.t1 where a=3;
-- Note that Delete-Delete conflict detected below
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
6
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
------------------------------------------------
Test 9 : Insert, Insert-Update-Delete conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Insert row on Primary Master
insert into test.t1 values (4, "Haymarket");
-- Insert row on Secondary Master
insert into test.t1 values (4, "Outhouse");
-- Update row on Secondary Master
update test.t1 set b="Mathers" where a = 4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Examine data (none) on Secondary Master
select * from test.t1 order by a;
a b
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Haymarket
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
9
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master (none)
select * from test.t1 order by a;
a b
-- Restart Secondary Master's slave
start slave;
-- Check data on Secondary Master, should be same as Primary Master
select * from test.t1;
a b
4 Haymarket
------------------------------------------------
Test 10 : Update, Delete-Insert-Update conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Blind poet" where a=4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Insert row on Secondary Master
insert into test.t1 values (4, "Drouthy Neebors");
-- Update row on Secondary Master
update test.t1 set b="The Tankard" where a=4;
-- Check data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on Secondary Master, as set
select * from test.t1 order by a;
a b
4 The Tankard
-- Restart Secondary Master slave
start slave;
-- Check data on Secondary Master - should be as Primary
select * from test.t1 order by a;
a b
4 Blind poet
------------------------------------------------------------------------
Test 11 : Test Secondary insert-update-delete accepted
------------------------------------------------------------------------
Insert row on Secondary
insert into test.t1 values (5, "Minders");
Update row on Secondary
update test.t1 set b="Southsider" where a=5;
Delete row on Secondary
delete from test.t1 where a=5;
Check data on Primary, should be none. No new conflicts
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
drop table test.t1;
drop table test.t2;
drop table test.t1$EX;
Populate ndb_replication table as necessary
-- Default extra Gci bits
create table `test`.`t1$EX`
(server_id int unsigned,
master_server_id int unsigned,
master_epoch bigint unsigned,
count int unsigned,
a int not null,
d int,
primary key(server_id, master_server_id, master_epoch, count)) engine ndb;
Create table
create table test.t1(a int primary key, b varchar(255)) engine = ndb;
Create other table
create table test.t2(a int primary key, b int) engine = ndb;
----------------------------------
Test 1 : Basic two-way replication
----------------------------------
insert into test.t1 values (1, "Metropole");
FLUSH LOGS;
-- Verify that Max rep epoch has been updated
-- Primary Cluster Max Rep Epoch now beyond the original update epoch
-- Now update data on slave
update test.t1 set b="Favorit" where a=1;
-- Now check data on Primary
select * from test.t1 order by a;
a b
1 Favorit
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Now perform multiple consecutive updates on the Secondary
update test.t1 set b="Elephant house" where a=1;
update test.t1 set b="Beach house" where a=1;
select * from test.t1 order by a;
a b
1 Beach house
-- Now check they've applied on the Primary
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
--------------------------------------------
Test 2 : Normal Insert from Secondary Master
--------------------------------------------
-- Insert a new row on the Secondary
insert into test.t1 values (2, "Forrest");
-- Check it exists on the Primary
select * from test.t1 order by a;
a b
1 Beach house
2 Forrest
-- Update from the Secondary
update test.t1 set b="Reds" where a=2;
select * from test.t1 order by a;
a b
1 Beach house
2 Reds
delete from test.t1 where a=2;
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-------------------------------
Test 3 : Insert-Insert conflict
-------------------------------
stop slave;
-- Insert a row on the Primary Master
insert into test.t1 values (2, "Loopy Lornas");
-- Insert a row on the secondary Master
insert into test.t1 values (2, "Cloisters");
-- Examine data on Primary Master (should be unaffected)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-- Examine conflict indicators on Primary Master
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on isolated secondary Master (should be as-set)
select * from test.t1 order by a;
a b
1 Beach house
2 Cloisters
-- Restart secondary Masters slave
start slave;
-- Reexamine secondary Master's data (should be same as Primary Masters)
select * from test.t1 order by a;
a b
1 Beach house
2 Loopy Lornas
-------------------------------
Test 4 : Update-Update conflict
-------------------------------
-- Stop replication to secondary master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Peters Yard" where a=2;
-- Show data on Primary Master
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Update row on Secondary Master
update test.t1 set b="Toast" where a=2;
-- Examine data on Primary Master - should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on secondary - should be as set
select * from test.t1 order by a;
a b
1 Beach house
2 Toast
-- Now restart slave, will re-align row
start slave;
-- Check that Secondary is re-aligned
select * from test.t1 order by a;
a b
1 Beach house
2 Peters Yard
-------------------------------
Test 5 : Update-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Update on Primary Master
update test.t1 set b="Pear tree" where a = 2;
-- Delete on Secondary Master
delete from test.t1 where a = 2;
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
3
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, still missing
select * from test.t1 order by a;
a b
1 Beach house
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master
select * from test.t1 order by a;
a b
1 Beach house
2 Pear tree
-------------------------------
Test 6 : Delete-Update conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=2;
-- Update on Secondary Master
update test.t1 set b="Black pig" where a=2;
-- Examine data on Primary Master, should be unaffected (no row)
select * from test.t1 order by a;
a b
1 Beach house
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, should be as inserted
select * from test.t1 order by a;
a b
1 Beach house
2 Black pig
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, aligned with Master (deleted)
select * from test.t1 order by a;
a b
1 Beach house
-------------------------------
Test 7 : Delete-Delete conflict
-------------------------------
-- Stop Secondary slave
stop slave;
-- Delete on Primary Master
delete from test.t1 where a=1;
-- Delete on Secondary Master
delete from test.t1 where a=1;
-- Examine data on Primary Master, no row
select * from test.t1 order by a;
a b
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
5
ndb_epoch_delete_delete
1
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master before slave restart, no row
select * from test.t1 order by a;
a b
-- Restart Secondary Master slave
start slave;
-- Examine data on Secondary Master after slave restart, no row
select * from test.t1 order by a;
a b
------------------------------------------------
Test 8 : Delete-Delete, Insert conflict exposure
------------------------------------------------
-- Insert a row on Secondary Master
insert into test.t1 values (3, "Espy");
-- Check it's present on Primary Master
select * from test.t1 order by a;
a b
3 Espy
-- Stop replication in both directions
stop slave;
stop slave;
-- Delete row from both clusters
delete from test.t1 where a=3;
delete from test.t1 where a=3;
-- Follow up with Insert from Secondary master
insert into test.t1 values (3, "Dalriada");
-- Restart replication in both directions
start slave;
start slave;
-- Check data on both sites
-- diverged with NDB$EPOCH
-- consistent with NDB$EPOCH2
-- Secondary master :
select * from test.t1 order by a;
a b
3 Dalriada
-- Primary master :
select * from test.t1 order by a;
a b
3 Dalriada
--Remove extra row
delete from test.t1 where a=3;
-- Note that Delete-Delete conflict detected below
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
6
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
------------------------------------------------
Test 9 : Insert, Insert-Update-Delete conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Insert row on Primary Master
insert into test.t1 values (4, "Haymarket");
-- Insert row on Secondary Master
insert into test.t1 values (4, "Outhouse");
-- Update row on Secondary Master
update test.t1 set b="Mathers" where a = 4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Examine data (none) on Secondary Master
select * from test.t1 order by a;
a b
-- Examine data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Haymarket
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
9
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Examine data on Secondary Master (none)
select * from test.t1 order by a;
a b
-- Restart Secondary Master's slave
start slave;
-- Check data on Secondary Master, should be same as Primary Master
select * from test.t1;
a b
4 Haymarket
------------------------------------------------
Test 10 : Update, Delete-Insert-Update conflict
------------------------------------------------
-- Stop replication on Secondary Master
stop slave;
-- Update row on Primary Master
update test.t1 set b="Blind poet" where a=4;
-- Delete row on Secondary Master
delete from test.t1 where a=4;
-- Insert row on Secondary Master
insert into test.t1 values (4, "Drouthy Neebors");
-- Update row on Secondary Master
update test.t1 set b="The Tankard" where a=4;
-- Check data on Primary Master, should be unaffected
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
-- Check data on Secondary Master, as set
select * from test.t1 order by a;
a b
4 The Tankard
-- Restart Secondary Master slave
start slave;
-- Check data on Secondary Master - should be as Primary
select * from test.t1 order by a;
a b
4 Blind poet
------------------------------------------------------------------------
Test 11 : Test Secondary insert-update-delete accepted
------------------------------------------------------------------------
Insert row on Secondary
insert into test.t1 values (5, "Minders");
Update row on Secondary
update test.t1 set b="Southsider" where a=5;
Delete row on Secondary
delete from test.t1 where a=5;
Check data on Primary, should be none. No new conflicts
select * from test.t1 order by a;
a b
4 Blind poet
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
12
ndb_epoch_delete_delete
2
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
server_id master_server_id master_epoch count a d
3 1 # 1 # #
3 1 # 2 # #
3 1 # 3 # #
3 1 # 4 # #
3 1 # 5 # #
3 1 # 6 # #
3 1 # 7 # #
3 1 # 8 # #
3 1 # 9 # #
3 1 # 10 # #
3 1 # 11 # #
3 1 # 12 # #
SELECT * FROM `t1$EX` ORDER BY a, d;
server_id master_server_id master_epoch count a d
3 1 # # 1 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 2 NULL
3 1 # # 3 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
3 1 # # 4 NULL
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
drop table test.t1;
drop table test.t2;
drop table test.t1$EX;
Now test batched conflict detection/handling
create table test.t1 (
a int primary key,
b int,
c varchar(2000)) engine=ndb;
-- Stop replication from Primary -> Secondary
stop slave;
-- Insert a row on Primary
insert into test.t1 values (1,1,repeat('B', 2000));
-- Generate a large batch of inserts with early + late conflicts
create procedure test.doit (rows int)
begin
set @x = 0;
START TRANSACTION;
repeat
insert into test.t1 values (@x, @x, repeat('B', 2000));
set @x = @x + 1;
until @x = rows
end repeat;
COMMIT;
START TRANSACTION;
update test.t1 set b=999, c=repeat('E',2000) where a=1;
COMMIT;
START TRANSACTION;
delete from test.t1 where a=1;
COMMIT;
START TRANSACTION;
insert into test.t1 values (1,1,'A');
COMMIT;
end%
call test.doit(100);
drop procedure test.doit;
-- Look at Primary status, expect 4 conflicts
Conflict algorithm counter diff :
ndb_conflict_fn_epoch2
4
Exception table contents
SELECT server_id, master_server_id, master_epoch, count, a, d FROM `t1$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t1$EX` ORDER BY a, d;
SELECT * FROM `t2$EX` ORDER BY server_id, master_server_id, master_epoch, count;
SELECT * FROM `t2$EX` ORDER BY a, d;
start slave;
-- Look at Seconday row
select a,b,sha1(c) from test.t1 where a=1;
a b sha1(c)
1 1 6d41e1d402596dff36396d1f0f288d17a4b9800a
-- Check it's the same on the Secondary
select a,b,sha1(c) from test.t1 where a=1;
a b sha1(c)
1 1 6d41e1d402596dff36396d1f0f288d17a4b9800a
Test batching of DELETE vs DELETE with following INSERT
delete from test.t1;
insert into test.t1 values (1, 1, "Ma Brows");
-- Stop Slave in both directions
stop slave;
stop slave;
-- Delete row on Primary Cluster
delete from test.t1 where a=1;
-- Delete row on Secondary Cluster, followed by Insert in later 'batch'
create procedure test.doit (rows int)
begin
set @x = 2;
START TRANSACTION;
delete from test.t1 where a=1;
repeat
insert into test.t1 values (@x, @x, repeat('B', 2000));
set @x = @x + 1;
until @x = (rows + 2)
end repeat;
COMMIT;
START TRANSACTION;
insert into test.t1 values (1, 1, 'Malleny arms');
COMMIT;
end%
call test.doit(200);
-- Restart slave on Primary Cluster
start slave;
-- Show data on Primary Cluster (should have row inserted on Secondary)
select * from test.t1 where a=1;
a b c
1 1 Malleny arms
-- Show data on Secondary Cluster (should have row inserted on Secondary)
select * from test.t1 where a=1;
a b c
1 1 Malleny arms
--Restart slave on Secondary Cluster
start slave;
-- Show data on Clusters after slaves restarted+synced
For NDB$EPOCH, the data will be missing
as expected with delete vs delete conflict
followed closely by Insert
For NDB$EPOCH2, the data will be present on both
clusters.
PRIMARY
select * from test.t1 where a=1;
a b c
1 1 Malleny arms
SECONDARY
select * from test.t1 where a=1;
a b c
1 1 Malleny arms
-- Force wait for master to be in-sync with slave
To avoid race between DML and table drop
flush logs;
drop procedure test.doit;
drop table test.t1;
delete from mysql.ndb_replication;
insert into mysql.ndb_replication values
("test", "t3", 0, 7, "NDB$EPOCH2(32)"),
("test", "t4", 0, 7, "NDB$EPOCH2(-1)");
create table test.t3 (a int primary key) engine=ndb;
ERROR HY000: Got error 1626 'Unknown error code' from NDBCLUSTER
show warnings;
Level Code Message
Warning 1626 Error in parsing conflict function. Message: NDB$EPOCH2(32), Too many extra Gci bits at ')'
Error 1296 Got error 1626 'Unknown error code' from NDBCLUSTER
create table test.t4 (a int primary key) engine=ndb;
ERROR HY000: Got error 1626 'Unknown error code' from NDBCLUSTER
show warnings;
Level Code Message
Warning 1626 Error in parsing conflict function. Message: NDB$EPOCH2(-1), Too many extra Gci bits at ')'
Error 1296 Got error 1626 'Unknown error code' from NDBCLUSTER
-- Force sync before dropping table to avoid race
flush logs;
flush logs;
drop table mysql.ndb_replication;
-- Attempt to get system back in pre-test state
stop slave;
reset slave;
include/rpl_end.inc
SET GLOBAL ndb_slave_conflict_role="NONE";
SET GLOBAL ndb_slave_conflict_role="NONE";