mirror of
https://github.com/MariaDB/server.git
synced 2025-08-07 00:04:31 +03:00
MDEV-15152 Optimistic parallel slave doesnt cope well with START SLAVE UNTIL
The immediate bug was caused by a failure to recognize a correct position to stop the slave applier run in optimistic parallel mode. There were the following set of issues that the analysis unveil. 1 incorrect estimate for the event binlog position passed to is_until_satisfied 2 wait for workers to complete by the driver thread did not account non-group events that could be left unprocessed and thus to mix up the last executed binlog group's file and position: the file remained old and the position related to the new rotated file 3 incorrect 'slave reached file:pos' by the parallel slave report in the error log 4 relay log UNTIL missed out the parallel slave branch in is_until_satisfied. The patch addresses all of them to simplify logics of log change notification in either the master and relay-log until case. P.1 is addressed with passing the event into is_until_satisfied() for proper analisis by the function. P.2 is fixed by changes in handle_queued_pos_update(). P.4 required removing relay-log change notification by workers. Instead the driver thread updates the notion of the current relay-log fully itself with aid of introduced bool Relay_log_info::until_relay_log_names_defer. An extra print out of the requested until file:pos is arranged with --log-warning=3.
This commit is contained in:
Andrei Elkin
465
mysql-test/suite/rpl/t/rpl_parallel_optimistic_until.test
Normal file
465
mysql-test/suite/rpl/t/rpl_parallel_optimistic_until.test
Normal file
@@ -0,0 +1,465 @@
|
||||
--source include/have_innodb.inc
|
||||
--source include/have_debug.inc
|
||||
--source include/have_debug_sync.inc
|
||||
--source include/master-slave.inc
|
||||
# Format is restricted because the test expects a specific result of
|
||||
# relay-logging that splits a transaction into two different files.
|
||||
--source include/have_binlog_format_row.inc
|
||||
|
||||
#
|
||||
# MDEV-15152 Optimistic parallel slave doesn't cope well with START SLAVE UNTIL
|
||||
#
|
||||
--connection slave
|
||||
--source include/stop_slave.inc
|
||||
RESET MASTER;
|
||||
RESET SLAVE;
|
||||
|
||||
--connection master
|
||||
RESET MASTER;
|
||||
CREATE TABLE t1 (a int primary key, b text) ENGINE=InnoDB;
|
||||
--let $a0 = 25
|
||||
--eval INSERT INTO t1 SET a=$a0, b='trx0'
|
||||
# Memorize the position for replication restart from it
|
||||
--let $pos_trx0 = query_get_value(SHOW MASTER STATUS, Position, 1)
|
||||
|
||||
--connection slave
|
||||
--source include/start_slave.inc
|
||||
|
||||
--connection master
|
||||
# --connection slave
|
||||
--sync_slave_with_master
|
||||
--source include/stop_slave.inc
|
||||
ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
|
||||
SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
|
||||
SET GLOBAL slave_parallel_threads=2;
|
||||
SET @old_parallel_mode=@@GLOBAL.slave_parallel_mode;
|
||||
SET GLOBAL slave_parallel_mode='optimistic';
|
||||
|
||||
# Run the slave in the following modes one by one.
|
||||
#
|
||||
# 1. the until position is set in the middle of trx2
|
||||
# below $pos_trx0 of the last exec position in the first file
|
||||
# 2. and above $pos_trx0
|
||||
# In either case trx2 must commit before slave stops.
|
||||
# 3. the until postion is inside trx1
|
||||
# 4. RELAY log until inside trx1
|
||||
# 5. RELAY log until inside a "big" trx
|
||||
# 6. RELAY log until inside a trx within a sequence of relay logs
|
||||
#
|
||||
# Execution flaw for Until_Master_Pos cases follows as:
|
||||
# create the transaction trx1, trx2
|
||||
# logged at the beginning of two subsequent binlog files.
|
||||
# Set the until position to at the middle of the 2rd transaction.
|
||||
# Engage the optimistic scheduler while having trx1 execution blocked.
|
||||
# Lift the block after trx2 has reached waiting its order to commit.
|
||||
# *Proof 1*
|
||||
# Observe that the slave applier stops at a correct position.
|
||||
# In the bug condition it would stop prematurely having the stop position
|
||||
# in the first file, therefore trx2 not committed.
|
||||
# Specifically, an internal transaction position until makes the applier to run
|
||||
# beyond it to commit commit the current transaction.
|
||||
# *Proof 2*
|
||||
# Observe the following START SLAVE resumes OK.
|
||||
#
|
||||
# Auxiliary third trx3 on master is just for triggering the actual stop
|
||||
# (whihc is a legacy UNTIL's property).
|
||||
# trx0 is to produce a specific value of the last executed binlog file:pos
|
||||
# to emulate the bug condition.
|
||||
#
|
||||
# Intermediate checks via SELECT are supposed to succeed
|
||||
# with putting out value 1.
|
||||
#
|
||||
# NOTE: Relay log until tests have to use explicit log names and position
|
||||
# which may require to adjust with future changes to event formats etc.
|
||||
#
|
||||
|
||||
--connection slave
|
||||
SET @old_max_relay_log_size = @@global.max_relay_log_size;
|
||||
SET @@global.max_relay_log_size=4096;
|
||||
|
||||
--connection master
|
||||
# trx1
|
||||
--let $a=1
|
||||
BEGIN;
|
||||
while (`SELECT $a < $a0`)
|
||||
{
|
||||
--eval INSERT INTO t1 SET a=$a, b='trx1'
|
||||
--inc $a
|
||||
}
|
||||
COMMIT;
|
||||
--let $fil_1 = query_get_value(SHOW MASTER STATUS, File, 1)
|
||||
--let $pos_trx1 = query_get_value(SHOW MASTER STATUS, Position, 1)
|
||||
|
||||
FLUSH LOGS;
|
||||
|
||||
# $pos_0 the offset of the first event of trx2 in new file
|
||||
--let $pos_0=query_get_value(SHOW MASTER STATUS, Position, 1)
|
||||
# trx2
|
||||
--let $a=$a0
|
||||
BEGIN;
|
||||
--eval UPDATE t1 SET b='trx2_0' WHERE a = $a
|
||||
--eval UPDATE t1 SET b='trx2' WHERE a = $a
|
||||
COMMIT;
|
||||
--let $fil_2=query_get_value(SHOW MASTER STATUS, File, 1)
|
||||
--let $pos_trx2=query_get_value(SHOW MASTER STATUS, Position, 1)
|
||||
|
||||
# trx3
|
||||
--let $a=$a0
|
||||
--inc $a
|
||||
--eval INSERT INTO t1 SET a=$a,b='trx3'
|
||||
--let $pos_trx3=query_get_value(SHOW MASTER STATUS, Position, 1)
|
||||
--let $a=
|
||||
|
||||
|
||||
--echo *** case 1 UNTIL inside trx2
|
||||
|
||||
--connection slave1
|
||||
# Blocker to hold off EXEC_MASTER_LOG_POS advance
|
||||
BEGIN;
|
||||
--eval INSERT INTO t1 SET a= 1
|
||||
--connection slave
|
||||
--let $pos_until=`SELECT $pos_trx0 - 1`
|
||||
--replace_result $pos_0 <pos_0> $pos_until <pos_until> $pos_trx2 <pos_trx2>
|
||||
--eval SELECT $pos_0 <= $pos_until AND $pos_until < $pos_trx2 as "pos_until < trx0 and is within trx2"
|
||||
CHANGE MASTER TO MASTER_USE_GTID=no;
|
||||
--replace_result $fil_2 file_2 $pos_until <pos_until>
|
||||
--eval START SLAVE UNTIL MASTER_LOG_FILE = '$fil_2', MASTER_LOG_POS = $pos_until
|
||||
|
||||
--let $wait_condition= SELECT COUNT(*) > 0 FROM information_schema.processlist WHERE state = "Waiting for prior transaction to commit"
|
||||
--source include/wait_condition.inc
|
||||
|
||||
--connection slave1
|
||||
# unblock to see the slave applier stops at $until
|
||||
ROLLBACK;
|
||||
|
||||
--echo Proof 1: Correct stop
|
||||
--connection slave
|
||||
--source include/wait_for_slave_sql_to_stop.inc
|
||||
--let $file_stop= query_get_value(SHOW SLAVE STATUS, Relay_Master_Log_File, 1)
|
||||
--let $pos_stop= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1)
|
||||
if (`SELECT "$file_stop" != "$fil_2" OR $pos_stop < $pos_until`)
|
||||
{
|
||||
--echo *** ERROR: Slave stopped at $file_stop:$pos_stop which is not $fil_2:$pos_until.
|
||||
--die
|
||||
}
|
||||
--eval SELECT count(*) = 1 as 'trx2 is committed' FROM t1 WHERE b = 'trx2'
|
||||
--eval SELECT count(*) = 0 as 'trx3 is not committed' FROM t1 WHERE b = 'trx3'
|
||||
|
||||
--echo Proof 2: Resume works out
|
||||
--source include/start_slave.inc
|
||||
--connection master
|
||||
--sync_slave_with_master
|
||||
|
||||
|
||||
--echo *** case 2 UNTIL inside trx2
|
||||
|
||||
--connection slave
|
||||
--eval DELETE FROM t1 WHERE a <> $a0
|
||||
--eval UPDATE t1 SET b='trx0' WHERE a = $a0
|
||||
|
||||
--connection slave1
|
||||
# Blocker to hold off EXEC_MASTER_LOG_POS advance
|
||||
BEGIN;
|
||||
--eval INSERT INTO t1 SET a= 1
|
||||
|
||||
--connection slave
|
||||
--source include/stop_slave.inc
|
||||
|
||||
--let $pos_until=`SELECT $pos_trx2 - 1`
|
||||
--replace_result $pos_trx0 <pos_0> $pos_until <pos_until> $pos_trx2 <pos_trx2>
|
||||
--eval SELECT $pos_trx0 <= $pos_until AND $pos_until < $pos_trx2 as "pos_until >= trx0 and is within trx2"
|
||||
--replace_result $fil_1 file_1 $pos_trx0 <pos_trx0>
|
||||
--eval CHANGE MASTER TO MASTER_LOG_FILE = '$fil_1', MASTER_LOG_POS = $pos_trx0, MASTER_USE_GTID=no
|
||||
--replace_result $fil_2 file_2 $pos_until <pos_until>
|
||||
--eval START SLAVE UNTIL MASTER_LOG_FILE = '$fil_2', MASTER_LOG_POS = $pos_until
|
||||
|
||||
--let $wait_condition= SELECT COUNT(*) > 0 FROM information_schema.processlist WHERE state = "Waiting for prior transaction to commit"
|
||||
--source include/wait_condition.inc
|
||||
|
||||
--connection slave1
|
||||
# unblock to see the slave applier stops at $until
|
||||
ROLLBACK;
|
||||
|
||||
--echo Proof 1: Correct stop
|
||||
--connection slave
|
||||
--source include/wait_for_slave_sql_to_stop.inc
|
||||
--let $file_stop= query_get_value(SHOW SLAVE STATUS, Relay_Master_Log_File, 1)
|
||||
--let $pos_stop= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1)
|
||||
if (`SELECT "$file_stop" != "$fil_2" OR $pos_stop < $pos_until`)
|
||||
{
|
||||
--echo *** ERROR: Slave stopped at $file_stop:$pos_stop which is not $fil_2:$pos_until.
|
||||
--die
|
||||
}
|
||||
--eval SELECT count(*) = 1 as 'trx2 is committed' FROM t1 WHERE b = 'trx2'
|
||||
--eval SELECT count(*) = 0 as 'trx3 is not committed' FROM t1 WHERE b = 'trx3'
|
||||
|
||||
--echo Proof 2: Resume works out
|
||||
--source include/start_slave.inc
|
||||
--connection master
|
||||
--sync_slave_with_master
|
||||
|
||||
|
||||
--echo *** case 3 UNTIL inside trx1
|
||||
|
||||
--connection slave
|
||||
--eval DELETE FROM t1 WHERE a <> $a0
|
||||
--eval UPDATE t1 SET b='trx0' WHERE a = $a0
|
||||
|
||||
|
||||
--connection slave1
|
||||
# Blocker to hold off EXEC_MASTER_LOG_POS advance
|
||||
BEGIN;
|
||||
--eval INSERT INTO t1 SET a= 1; # block trx1
|
||||
|
||||
--connection slave
|
||||
--source include/stop_slave.inc
|
||||
|
||||
--let $pos_until=`SELECT $pos_0 - 1`
|
||||
--replace_result $pos_0 <pos_0> $pos_until <pos_until> $pos_trx2 <pos_trx2>
|
||||
--eval SELECT $pos_until < $pos_0 as "pos_until before trx2 start position"
|
||||
--replace_result $fil_1 file_1 $pos_trx0 <pos_trx0>
|
||||
--eval CHANGE MASTER TO MASTER_LOG_FILE = '$fil_1', MASTER_LOG_POS = $pos_trx0, MASTER_USE_GTID=no
|
||||
--replace_result $fil_2 file_2 $pos_until <pos_until>
|
||||
--eval START SLAVE UNTIL MASTER_LOG_FILE = '$fil_2', MASTER_LOG_POS = $pos_until
|
||||
|
||||
--connection slave1
|
||||
# unblock to see the slave applier stops at $until
|
||||
ROLLBACK;
|
||||
|
||||
--echo Proof 1: Correct stop
|
||||
--connection slave
|
||||
--source include/wait_for_slave_sql_to_stop.inc
|
||||
--let $file_stop= query_get_value(SHOW SLAVE STATUS, Relay_Master_Log_File, 1)
|
||||
--let $pos_stop= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1)
|
||||
if (`SELECT "$file_stop" != "$fil_2" OR $pos_stop < $pos_until`)
|
||||
{
|
||||
--echo *** ERROR: Slave stopped at $file_stop:$pos_stop which is not $fil_2:$pos_until.
|
||||
--die
|
||||
}
|
||||
--eval SELECT count(*) = $a0-1 as 'trx1 is committed' FROM t1 WHERE b = 'trx1'
|
||||
--eval SELECT count(*) = 0 as 'trx2 is not committed' FROM t1 WHERE b = 'trx2'
|
||||
|
||||
--echo Proof 2: Resume works out
|
||||
--source include/start_slave.inc
|
||||
--connection master
|
||||
--sync_slave_with_master
|
||||
|
||||
|
||||
--echo *** case 4 Relay-log UNTIL inside trx1
|
||||
|
||||
--connection slave
|
||||
--eval DELETE FROM t1 WHERE a <> $a0
|
||||
--eval UPDATE t1 SET b='trx0' WHERE a = $a0
|
||||
|
||||
--connection slave1
|
||||
# Blocker to hold off EXEC_MASTER_LOG_POS advance
|
||||
BEGIN;
|
||||
--eval INSERT INTO t1 SET a= 1; # block trx1
|
||||
|
||||
--connection slave
|
||||
--source include/stop_slave.inc
|
||||
--replace_result $fil_1 file_1 $pos_trx0 <pos_trx0>
|
||||
--eval CHANGE MASTER TO MASTER_LOG_FILE = '$fil_1', MASTER_LOG_POS = $pos_trx0, MASTER_USE_GTID=no
|
||||
START SLAVE IO_THREAD;
|
||||
--source include/wait_for_slave_io_to_start.inc
|
||||
|
||||
# The following test sets the stop coordinate is set to inside the first event
|
||||
# of a relay log that holds events of a transaction started in an earlier log.
|
||||
# Peek the stop position in the middle of trx1, not even on a event boundary.
|
||||
--let $pos_until=255
|
||||
--let $file_rl=slave-relay-bin.000003
|
||||
--let $binlog_file=$file_rl
|
||||
|
||||
--let $pos_xid=508
|
||||
--let $info= query_get_value(SHOW RELAYLOG EVENTS IN '$file_rl' FROM $pos_xid LIMIT 1, Info, 1)
|
||||
|
||||
if (`SELECT "$info" NOT LIKE "COMMIT /* xid=% */" OR $pos_xid < $pos_until`)
|
||||
{
|
||||
--echo *** Unexpected offset. Refine it to point to the correct XID event!
|
||||
--die
|
||||
}
|
||||
|
||||
--replace_result $file_rl file_2 $pos_until <pos_until>
|
||||
--eval START SLAVE UNTIL RELAY_LOG_FILE = '$file_rl', RELAY_LOG_POS = $pos_until
|
||||
|
||||
--connection slave1
|
||||
# unblock to see the slave applier stops at $until
|
||||
ROLLBACK;
|
||||
|
||||
--echo Proof 1: Correct stop
|
||||
--connection slave
|
||||
--source include/wait_for_slave_sql_to_stop.inc
|
||||
--let $file_stop= query_get_value(SHOW SLAVE STATUS, Relay_Log_File, 1)
|
||||
--let $pos_stop= query_get_value(SHOW SLAVE STATUS, Relay_Log_Pos, 1)
|
||||
if (`SELECT strcmp("$file_rl","$file_stop") > -1`)
|
||||
{
|
||||
--echo *** ERROR: Slave stopped at $file_stop:$pos_stop which is not $file_rl:$pos_until.
|
||||
--die
|
||||
}
|
||||
|
||||
--eval SELECT count(*) = $a0-1 as 'trx1 is committed' FROM t1 WHERE b = 'trx1'
|
||||
--eval SELECT count(*) = 0 as 'trx2 is not committed' FROM t1 WHERE b = 'trx2'
|
||||
|
||||
--echo Proof 2: Resume works out
|
||||
--source include/start_slave.inc
|
||||
--connection master
|
||||
--sync_slave_with_master
|
||||
|
||||
|
||||
|
||||
--echo *** case 5 Relay-log UNTIL inside a "big" trx that spawns few relay logs
|
||||
|
||||
--connection master
|
||||
CREATE TABLE t2 (a TEXT) ENGINE=InnoDB;
|
||||
FLUSH LOGS;
|
||||
|
||||
--sync_slave_with_master
|
||||
--let $file_stop= query_get_value(SHOW SLAVE STATUS, Relay_Log_File, 1)
|
||||
--let $pos_stop= query_get_value(SHOW SLAVE STATUS, Relay_Log_Pos, 1)
|
||||
--let $records=`SELECT floor(4*@@global.max_relay_log_size / 1024) + 1`
|
||||
|
||||
--connection slave
|
||||
--source include/stop_slave.inc
|
||||
|
||||
--connection master
|
||||
# trx4
|
||||
BEGIN;
|
||||
--let $i=$records
|
||||
while ($i)
|
||||
{
|
||||
INSERT INTO t2 SET a=repeat('a',1024);
|
||||
|
||||
--dec $i
|
||||
}
|
||||
COMMIT;
|
||||
|
||||
# slave will stop there:
|
||||
--let $file_trx4 = query_get_value(SHOW MASTER STATUS, File, 1)
|
||||
--let $pos_trx4 = query_get_value(SHOW MASTER STATUS, Position, 1)
|
||||
|
||||
# trx5
|
||||
INSERT INTO t2 SET a='a';
|
||||
--let $pos_trx5 = query_get_value(SHOW MASTER STATUS, Position, 1)
|
||||
|
||||
--connection slave
|
||||
START SLAVE IO_THREAD;
|
||||
--source include/wait_for_slave_io_to_start.inc
|
||||
|
||||
# Set position inside the transaction though the value
|
||||
# specified is beyond that relay log file.
|
||||
# The coordianate may point to in a different event in future changes
|
||||
# but should not move away from inside this big group of events.
|
||||
# So we don't test which event in the transaction it points to.
|
||||
--let $pos_until= 4500
|
||||
--let $file_rl= slave-relay-bin.000010
|
||||
|
||||
--replace_result $file_rl file_2 $pos_until <pos_until>
|
||||
--eval START SLAVE UNTIL RELAY_LOG_FILE = '$file_rl', RELAY_LOG_POS = $pos_until
|
||||
|
||||
--echo Proof 1: Correct stop
|
||||
--connection slave
|
||||
--source include/wait_for_slave_sql_to_stop.inc
|
||||
--let $file_stop= query_get_value(SHOW SLAVE STATUS, Relay_Master_Log_File, 1)
|
||||
--let $pos_stop= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1)
|
||||
# It's showed the actual stop occurred before trx5
|
||||
if (`SELECT strcmp("$file_trx4", "$file_stop") <> 0 OR $pos_stop >= $pos_trx5 OR count(*) <> $records FROM t2`)
|
||||
{
|
||||
--echo *** ERROR: Slave stopped at *binlog* $file_stop:$pos_stop which is not $file_trx4:$pos_trx4.
|
||||
--die
|
||||
}
|
||||
|
||||
--echo Proof 2: Resume works out
|
||||
--source include/start_slave.inc
|
||||
--connection master
|
||||
--sync_slave_with_master
|
||||
|
||||
--let $diff_tables=master:t2,slave:t2
|
||||
--source include/diff_tables.inc
|
||||
|
||||
|
||||
|
||||
--echo *** case 6 Relay-log UNTIL inside a small trx inside a sequence of relay logs
|
||||
|
||||
--connection slave
|
||||
--source include/stop_slave.inc
|
||||
|
||||
--connection master
|
||||
# trx6
|
||||
--let $records=`SELECT count(*) FROM t2`
|
||||
while ($records)
|
||||
{
|
||||
BEGIN;
|
||||
DELETE FROM t2 LIMIT 1;
|
||||
COMMIT;
|
||||
--dec $records
|
||||
}
|
||||
COMMIT;
|
||||
|
||||
--connection slave
|
||||
START SLAVE IO_THREAD;
|
||||
--source include/wait_for_slave_io_to_start.inc
|
||||
|
||||
--connection master
|
||||
--source include/sync_slave_io_with_master.inc
|
||||
|
||||
--connection slave
|
||||
# The relay-log coordinate is not at an event boundary and
|
||||
# also may change across the server version.
|
||||
# The test makes its best to check its coherance.
|
||||
--let $pos_until= 3130
|
||||
--let $file_rl= slave-relay-bin.000018
|
||||
|
||||
--let $pos_gtid = 2987
|
||||
--let $info= query_get_value(SHOW RELAYLOG EVENTS IN '$file_rl' FROM $pos_gtid LIMIT 1, Info, 1)
|
||||
|
||||
if (`SELECT "$info" != "BEGIN GTID 0-1-23"`)
|
||||
{
|
||||
--echo *** Unexpected offset. Refine it to point to the correct GTID!
|
||||
--die
|
||||
}
|
||||
--let $pos_event = 3120
|
||||
--let $type= query_get_value(SHOW RELAYLOG EVENTS IN '$file_rl' FROM $pos_event LIMIT 1, Event_type, 1)
|
||||
if (`SELECT "$type" != "Delete_rows_v1"`)
|
||||
{
|
||||
--echo *** Unexpected offset. Refine it to point to the expected event!
|
||||
--die
|
||||
}
|
||||
|
||||
--replace_result $file_rl file_2 $pos_until <pos_until>
|
||||
--eval START SLAVE UNTIL RELAY_LOG_FILE = '$file_rl', RELAY_LOG_POS = $pos_until
|
||||
|
||||
--echo Proof 1: Correct stop
|
||||
--connection slave
|
||||
--source include/wait_for_slave_sql_to_stop.inc
|
||||
--let $file_stop= query_get_value(SHOW SLAVE STATUS, Relay_Log_File, 1)
|
||||
--let $pos_stop= query_get_value(SHOW SLAVE STATUS, Relay_Log_Pos, 1)
|
||||
if (`SELECT strcmp("$file_stop", "$file_rl") = -1 OR
|
||||
strcmp("$file_stop", "$file_rl") = 0 AND $pos_stop < $pos_until`)
|
||||
{
|
||||
--echo *** ERROR: Slave stopped at *relay* $file_stop:$pos_stop which is not $file_rl:$pos_until.
|
||||
--die
|
||||
}
|
||||
|
||||
--echo Proof 2: Resume works out
|
||||
--source include/start_slave.inc
|
||||
--connection master
|
||||
--sync_slave_with_master
|
||||
|
||||
--let $diff_tables=master:t2,slave:t2
|
||||
--source include/diff_tables.inc
|
||||
|
||||
#
|
||||
# Clean up.
|
||||
#
|
||||
--connection slave
|
||||
--source include/stop_slave.inc
|
||||
SET GLOBAL max_relay_log_size=@old_max_relay_log_size;
|
||||
SET GLOBAL slave_parallel_mode=@old_parallel_mode;
|
||||
SET GLOBAL slave_parallel_threads=@old_parallel_threads;
|
||||
--source include/start_slave.inc
|
||||
|
||||
--connection master
|
||||
DROP TABLE t1, t2;
|
||||
|
||||
--sync_slave_with_master
|
||||
--source include/rpl_end.inc
|
||||
Reference in New Issue
Block a user