config root man

# The include statement below is a temp one for tests that are yet to
#be ported to run with InnoDB,
#but needs to be kept for tests that would need MyISAM in future.
--source include/force_myisam_default.inc

-- source include/have_ndb.inc

# store start value
SET @global_start_value = @@global.ndb_optimized_node_selection;
SELECT @global_start_value;

# max value
set session ndb_optimized_node_selection=3;
show variables like 'ndb_optimized_node_selection';

# min value
set session ndb_optimized_node_selection=0;
show variables like 'ndb_optimized_node_selection';

# out of range
set session ndb_optimized_node_selection=4;
show variables like 'ndb_optimized_node_selection';

# global
set global ndb_optimized_node_selection=1;
show variables like 'ndb_optimized_node_selection';

# check it
--connect (another_con, localhost, root,,)
--connection another_con
show variables like 'ndb_optimized_node_selection';

# reset
set global ndb_optimized_node_selection=3;
# does not work for some reason
#SET @@global.ndb_optimized_node_selection = @global_start_value;
SELECT @@global.ndb_optimized_node_selection;