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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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18
mysql-test/suite/rpl/r/rpl_parallel_multilevel.result
View File

@ -6,26 +6,26 @@ include/stop_slave.inc
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='optimistic';
SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
include/stop_slave.inc
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='optimistic';
SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
include/stop_slave.inc
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';
*** MDEV-6676: Test that @@replicate_allow_parallel is preserved in slave binlog ***
SET GLOBAL slave_parallel_mode='optimistic';
*** MDEV-6676: Test that @@skip_parallel_replication is preserved in slave binlog ***
INSERT INTO t1 VALUES(1,1);
BEGIN;
INSERT INTO t1 VALUES(2,1);
INSERT INTO t1 VALUES(3,1);
COMMIT;
SET SESSION replicate_allow_parallel=0;
SET SESSION skip_parallel_replication=1;
UPDATE t1 SET b=b+1 WHERE a=2;
UPDATE t1 SET b=b+1 WHERE a=2;
UPDATE t1 SET b=b+1 WHERE a=2;
@ -36,7 +36,7 @@ UPDATE t1 SET b=b+1 WHERE a=2;
UPDATE t1 SET b=b+1 WHERE a=2;
UPDATE t1 SET b=b+1 WHERE a=2;
UPDATE t1 SET b=b+1 WHERE a=2;
SET SESSION replicate_allow_parallel=1;
SET SESSION skip_parallel_replication=0;
SELECT * FROM t1 ORDER BY a;
a b
1 1
@ -73,13 +73,13 @@ Ok, no retry
*** MDEV-6676: Test that the FL_WAITED flag in GTID is preserved in slave binlog ***
include/stop_slave.inc
CHANGE MASTER TO master_use_gtid=slave_pos;
SET GLOBAL slave_parallel_mode='domain,transactional';
SET GLOBAL slave_parallel_mode='optimistic';
include/stop_slave.inc
CHANGE MASTER TO master_use_gtid=slave_pos;
SET GLOBAL slave_parallel_mode='domain,transactional';
SET GLOBAL slave_parallel_mode='optimistic';
include/stop_slave.inc
CHANGE MASTER TO master_use_gtid=slave_pos;
SET GLOBAL slave_parallel_mode='domain,transactional';
SET GLOBAL slave_parallel_mode='optimistic';
BEGIN;
UPDATE t1 SET b=b+1 WHERE a=2;
SET debug_sync="thd_report_wait_for SIGNAL waiting1";