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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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2
mysql-test/suite/rpl/r/rpl_parallel_optimistic_nobinlog.result
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@@ -11,7 +11,7 @@ SET GLOBAL TRANSACTION ISOLATION LEVEL READ COMMITTED;
SET GLOBAL slave_parallel_threads=10;
CHANGE MASTER TO master_use_gtid=slave_pos;
SET @old_parallel_mode=@@GLOBAL.slave_parallel_mode;
SET GLOBAL slave_parallel_mode='domain,transactional,waiting';
SET GLOBAL slave_parallel_mode='aggressive';
*** Test that we replicate correctly when using READ COMMITTED and --log-slave-updates=0 on the slave ***
INSERT INTO t1 SELECT 4, COUNT(*) FROM t2;
INSERT INTO t2 SELECT 4, COUNT(*) FROM t1;