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include/master-slave.inc
[connection master]
#
# MDEV-29639: Seconds_Behind_Master is incorrect for Delayed, Parallel Replicas
#
connection slave;
include/stop_slave.inc
set @@GLOBAL.debug_dbug= "d,negate_clock_diff_with_master";
set @@GLOBAL.slave_parallel_mode= CONSERVATIVE;
change master to master_delay=3, master_use_gtid=Slave_Pos;
include/start_slave.inc
connection master;
create table t1 (a int);
create table t2 (a int);
include/sync_slave_sql_with_master.inc
#
# Pt 1) Ensure SBM is updated immediately upon arrival of the next event
connection master;
# Sleep 2 to allow a buffer between events for SBM check
insert into t1 values (0);
include/save_master_gtid.inc
connection slave;
# Waiting for transaction to arrive on slave and begin SQL Delay..
# Validating SBM is updated on event arrival..
# ..done
# MDEV-32265. At time of STOP SLAVE, if the SQL Thread is currently
# delaying a transaction; then when the reciprocal START SLAVE occurs,
# if the event is still to be delayed, SBM should resume accordingly
include/stop_slave.inc
# Lock t1 on slave to ensure the event can't finish (and thereby update
# Seconds_Behind_Master) so slow running servers don't accidentally
# catch up to the master before checking SBM.
connection server_2;
LOCK TABLES t1 WRITE;
include/start_slave.inc
connection slave;
# Waiting for replica to get blocked by the table lock
# Sleeping 1s to increment SBM
# Ensuring Seconds_Behind_Master increases after sleeping..
# ..done
connection server_2;
UNLOCK TABLES;
include/sync_with_master_gtid.inc
#
# Pt 2) If the worker threads have not entered an idle state, ensure
# following events do not update SBM
connection slave;
LOCK TABLES t1 WRITE;
connection master;
# Sleep 2 to allow a buffer between events for SBM check
insert into t1 values (1);
# Sleep 3 to create gap between events
insert into t1 values (2);
include/save_master_pos.inc
connection slave;
# Wait for first transaction to complete SQL delay and begin execution..
# Validate SBM calculation doesn't use the second transaction because worker threads shouldn't have gone idle..
# ..and that SBM wasn't calculated using prior committed transactions
# ..done
connection slave;
UNLOCK TABLES;
include/wait_for_slave_param.inc [Relay_Master_Log_File]
include/wait_for_slave_param.inc [Exec_Master_Log_Pos]
# Cleanup
include/stop_slave.inc
CHANGE MASTER TO master_delay=0;
include/start_slave.inc
#
# MDEV-30619: Parallel Slave SQL Thread Can Update Seconds_Behind_Master with Active Workers
#
connection slave;
# Ensure the replica is fully idle before starting transactions
# Lock t1 on slave so the first received transaction does not complete/commit
LOCK TABLES t1 WRITE;
connection master;
insert into t1 values (3);
include/save_master_gtid.inc
connection slave;
# Waiting for first transaction to begin..
connection master;
# Sleep 2 sec to create a gap between events
INSERT INTO t2 VALUES (1);
include/save_master_gtid.inc
connection slave;
# Waiting for second transaction to begin..
connection slave;
UNLOCK TABLES;
include/sync_with_master_gtid.inc
#
# Cleanup
connection master;
DROP TABLE t1, t2;
include/save_master_gtid.inc
connection slave;
include/sync_with_master_gtid.inc
include/stop_slave.inc
set @@GLOBAL.debug_dbug= "";
set @@GLOBAL.slave_parallel_mode= "$save_parallel_mode";
include/start_slave.inc
include/rpl_end.inc
# End of rpl_parallel_sbm.test
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