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MDEV-162 Enhanced semisync replication

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Implement --semi-sync-master-wait-point=AFTER_SYNC|AFTER_COMMIT.

When AFTER_SYNC, the semi-sync wait will be done earlier, before the storage
engine commit rather than after. This means that a transaction will not be
visible on the master until at least one slave has received it.
This commit is contained in:
Jonas Oreland
2014-12-23 13:38:00 +01:00
committed by Kristian Nielsen
parent 4d8b346e07
commit 0b87de124d
29 changed files with 1735 additions and 46 deletions
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6
mysql-test/suite/innodb/r/group_commit_no_optimize_thread.result
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@ -3,11 +3,11 @@ SELECT variable_value INTO @commits FROM information_schema.global_status
WHERE variable_name = 'binlog_commits';
SELECT variable_value INTO @group_commits FROM information_schema.global_status
WHERE variable_name = 'binlog_group_commits';
SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group1_running WAIT_FOR group2_queued";
SET DEBUG_SYNC= "commit_before_get_LOCK_after_binlog_sync SIGNAL group1_running WAIT_FOR group2_queued";
INSERT INTO t1 VALUES ("con1");
set DEBUG_SYNC= "now WAIT_FOR group1_running";
SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL group2_con2";
SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group2_running";
SET DEBUG_SYNC= "commit_before_get_LOCK_after_binlog_sync SIGNAL group2_running";
SET DEBUG_SYNC= "commit_after_release_LOCK_log WAIT_FOR group3_committed";
INSERT INTO t1 VALUES ("con2");
SET DEBUG_SYNC= "now WAIT_FOR group2_con2";
@ -25,7 +25,7 @@ SET DEBUG_SYNC= "now SIGNAL group2_queued";
SELECT * FROM t1 ORDER BY a;
a
con1
SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group3_con5";
SET DEBUG_SYNC= "commit_before_get_LOCK_after_binlog_sync SIGNAL group3_con5";
SET DEBUG_SYNC= "commit_after_get_LOCK_log SIGNAL con5_leader WAIT_FOR con6_queued";
set DEBUG_SYNC= "now WAIT_FOR group2_running";
INSERT INTO t1 VALUES ("con5");