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MDEV-6676: Optimistic parallel replication

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Adjust the configuration options, as discussed on the
maria-developers@ mailing list.

The option to hint a transaction to not be replicated in parallel is
now called @@skip_parallel_replication, consistent with
@@skip_replication.

And the --slave-parallel-mode is now simplified to have just one of
the following values:

  none
  minimal
  conservative
  optimistic
  aggressive

This reflects successively harder efforts to find opportunities to run
things in parallel on the slave. It allows to extend the server with
more automatic heuristics in the future without having to introduce a
new configuration option for each and every one.
This commit is contained in:
Kristian Nielsen
2015-02-06 10:02:02 +01:00
parent 734c4c0143
commit 8672339328
41 changed files with 243 additions and 265 deletions
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12
mysql-test/suite/rpl/t/rpl_parallel.test
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@@ -1847,12 +1847,10 @@ SET GLOBAL slave_parallel_threads=10;
--let $status_items= Parallel_Mode
--source include/show_slave_status.inc
--source include/stop_slave.inc
--error ER_INVALID_SLAVE_PARALLEL_MODE
SET GLOBAL slave_parallel_mode='domain,follow_master_commit,transactional';
SET GLOBAL slave_parallel_mode='waiting,transactional,domain';
SET GLOBAL slave_parallel_mode='aggressive';
--let $status_items= Parallel_Mode
--source include/show_slave_status.inc
SET GLOBAL slave_parallel_mode='domain,follow_master_commit';
SET GLOBAL slave_parallel_mode='conservative';
--let $status_items= Parallel_Mode
--source include/show_slave_status.inc
@@ -1863,7 +1861,7 @@ INSERT INTO t2 VALUES (1040);
--source include/save_master_gtid.inc
--connection server_2
SET GLOBAL slave_parallel_mode='';
SET GLOBAL slave_parallel_mode='none';
# Test that we do not use parallel apply, by injecting an unconditional
# crash in the parallel apply code.
SET @old_dbug= @@GLOBAL.debug_dbug;
@@ -1897,12 +1895,12 @@ INSERT INTO t2 VALUES (1046);
SET gtid_domain_id = 0;
--source include/save_master_gtid.inc
--connection server_2
SET GLOBAL slave_parallel_mode=follow_master_commit;
SET GLOBAL slave_parallel_mode=minimal;
--source include/start_slave.inc
--source include/sync_with_master_gtid.inc
SELECT * FROM t2 WHERE a >= 1040 ORDER BY a;
--source include/stop_slave.inc
SET GLOBAL slave_parallel_mode='domain,follow_master_commit';
SET GLOBAL slave_parallel_mode='conservative';
--source include/start_slave.inc