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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/t/group_commit.test
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@ -27,7 +27,7 @@ connect(con6,localhost,root,,);
# group2 to queue up before finishing.
connection con1;
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";
send INSERT INTO t1 VALUES ("con1");
# Make group2 (with three threads) queue up.
@ -37,7 +37,7 @@ send INSERT INTO t1 VALUES ("con1");
connection con2;
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";
SET DEBUG_SYNC= "commit_after_group_run_commit_ordered SIGNAL group2_visible WAIT_FOR group2_checked";
send INSERT INTO t1 VALUES ("con2");
@ -69,7 +69,7 @@ connection default;
SELECT * FROM t1 ORDER BY a;
connection con5;
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";
send INSERT INTO t1 VALUES ("con5");