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MDEV-4506: Parallel replication.

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Improve STOP SLAVE in parallel mode.

Now, the parallel part will queue the current event group to the
end, and then stop queing any more events. Each worker will
complete the current event group, and then just skip any further
queued events.
This commit is contained in:
unknown
2013-10-08 14:36:06 +02:00
parent 45c3c71513
commit 12c760ef71
4 changed files with 161 additions and 9 deletions
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68
mysql-test/suite/rpl/t/rpl_parallel.test
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@ -165,7 +165,6 @@ CREATE TABLE t3 (a INT PRIMARY KEY, b INT) ENGINE=InnoDB;
# Create some sentinel rows so that the rows inserted in parallel fall into
# separate gaps and do not cause gap lock conflicts.
INSERT INTO t3 VALUES (1,1), (3,3), (5,5), (7,7);
SET binlog_format=@old_format;
--save_master_pos
--connection server_2
--sync_with_master
@ -264,6 +263,73 @@ SELECT * FROM t3 ORDER BY a;
--source include/show_binlog_events.inc
--echo *** Test STOP SLAVE in parallel mode ***
--connection server_2
--source include/stop_slave.inc
--connection server_1
# Set up a couple of transactions. The first will be blocked halfway
# through on a lock, and while it is blocked we initiate STOP SLAVE.
# We then test that the halfway-initiated transaction is allowed to
# complete, but no subsequent ones.
# We have to use statement-based mode and set
# binlog_direct_non_transactional_updates=0; otherwise the binlog will
# be split into two event groups, one for the MyISAM part and one for the
# InnoDB part.
SET binlog_direct_non_transactional_updates=0;
SET sql_log_bin=0;
CALL mtr.add_suppression("Statement is unsafe because it accesses a non-transactional table after accessing a transactional table within the same transaction");
SET sql_log_bin=1;
BEGIN;
INSERT INTO t2 VALUES (20);
--disable_warnings
INSERT INTO t1 VALUES (20);
--disable_warnings
INSERT INTO t2 VALUES (21);
INSERT INTO t3 VALUES (20, 20);
COMMIT;
INSERT INTO t3 VALUES(21, 21);
INSERT INTO t3 VALUES(22, 22);
SET binlog_format=@old_format;
--save_master_pos
# Start a connection that will block the replicated transaction halfway.
--connection con_temp1
BEGIN;
INSERT INTO t2 VALUES (21);
--connection server_2
START SLAVE;
# Wait for the MyISAM change to be visible, after which replication will wait
# for con_temp1 to roll back.
--let $wait_condition= SELECT COUNT(*) = 1 FROM t1 WHERE a=20
--source include/wait_condition.inc
--connection con_temp2
# Initiate slave stop. It will have to wait for the current event group
# to complete.
send STOP SLAVE;
--connection con_temp1
ROLLBACK;
--connection con_temp2
reap;
--connection server_2
--source include/wait_for_slave_to_stop.inc
# We should see the first transaction applied, but not the two others.
SELECT * FROM t1 WHERE a >= 20 ORDER BY a;
SELECT * FROM t2 WHERE a >= 20 ORDER BY a;
SELECT * FROM t3 WHERE a >= 20 ORDER BY a;
--source include/start_slave.inc
--sync_with_master
SELECT * FROM t1 WHERE a >= 20 ORDER BY a;
SELECT * FROM t2 WHERE a >= 20 ORDER BY a;
SELECT * FROM t3 WHERE a >= 20 ORDER BY a;
--connection server_2
--source include/stop_slave.inc
SET GLOBAL binlog_format=@old_format;