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MDEV-6676: Optimistic parallel replication
Implement a new mode for parallel replication. In this mode, all transactions are optimistically attempted applied in parallel. In case of conflicts, the offending transaction is rolled back and retried later non-parallel. This is an early-release patch to facilitate testing, more changes to user interface / options will be expected. The new mode is not enabled by default.
This commit is contained in:
Kristian Nielsen
295
mysql-test/suite/rpl/r/rpl_parallel_optimistic.result
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295
mysql-test/suite/rpl/r/rpl_parallel_optimistic.result
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@ -0,0 +1,295 @@
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include/rpl_init.inc [topology=1->2]
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ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
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CREATE TABLE t1 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
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SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
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include/stop_slave.inc
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SET GLOBAL slave_parallel_threads=10;
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CHANGE MASTER TO master_use_gtid=slave_pos;
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SET @old_parallel_mode=@@GLOBAL.slave_parallel_mode;
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SET GLOBAL slave_parallel_mode='domain,transactional';
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INSERT INTO t1 VALUES(1,1);
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BEGIN;
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INSERT INTO t1 VALUES(2,1);
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INSERT INTO t1 VALUES(3,1);
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COMMIT;
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DELETE FROM t1 WHERE a=2;
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INSERT INTO t1 VALUES (2,2);
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DELETE FROM t1 WHERE a=2;
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INSERT INTO t1 VALUES (2,3);
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DELETE FROM t1 WHERE a=2;
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INSERT INTO t1 VALUES (2,4);
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DELETE FROM t1 WHERE a=2;
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INSERT INTO t1 VALUES (2,5);
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DELETE FROM t1 WHERE a=3;
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INSERT INTO t1 VALUES(3,2);
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DELETE FROM t1 WHERE a=1;
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INSERT INTO t1 VALUES(1,2);
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DELETE FROM t1 WHERE a=3;
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INSERT INTO t1 VALUES(3,3);
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DELETE FROM t1 WHERE a=2;
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INSERT INTO t1 VALUES (2,6);
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include/save_master_gtid.inc
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SELECT * FROM t1 ORDER BY a;
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a b
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1 2
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2 6
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3 3
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include/start_slave.inc
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include/sync_with_master_gtid.inc
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SELECT * FROM t1 ORDER BY a;
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a b
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1 2
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2 6
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3 3
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*** Test a bunch of non-transactional/DDL event groups. ***
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include/stop_slave.inc
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INSERT INTO t1 VALUES (4,4);
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INSERT INTO t1 VALUES (5,5);
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CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=InnoDB;
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INSERT INTO t2 VALUES (1);
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CREATE TABLE t3 (a INT PRIMARY KEY) ENGINE=MyISAM;
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ALTER TABLE t2 ADD b INT;
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INSERT INTO t2 VALUES (2,2);
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ALTER TABLE t2 DROP b;
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INSERT INTO t2 VALUES (3);
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ALTER TABLE t2 ADD c INT;
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INSERT INTO t2 VALUES (4,5);
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INSERT INTO t2 VALUES (5,5);
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INSERT INTO t3 VALUES (1);
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UPDATE t2 SET c=NULL WHERE a=4;
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ALTER TABLE t2 ADD UNIQUE (c);
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INSERT INTO t2 VALUES (6,6);
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UPDATE t2 SET c=c+100 WHERE a=2;
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INSERT INTO t3(a) VALUES (2);
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DELETE FROM t3 WHERE a=2;
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INSERT INTO t3(a) VALUES (2);
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DELETE FROM t3 WHERE a=2;
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ALTER TABLE t3 CHANGE a c INT NOT NULL;
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INSERT INTO t3(c) VALUES (2);
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DELETE FROM t3 WHERE c=2;
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INSERT INTO t3 SELECT a+200 FROM t2;
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DELETE FROM t3 WHERE c >= 200;
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INSERT INTO t3 SELECT a+200 FROM t2;
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include/save_master_gtid.inc
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SELECT * FROM t1 ORDER BY a;
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a b
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1 2
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2 6
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3 3
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4 4
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5 5
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SELECT * FROM t2 ORDER BY a;
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a c
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1 NULL
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2 NULL
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3 NULL
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4 NULL
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5 5
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6 6
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SELECT * FROM t3 ORDER BY c;
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c
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1
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201
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202
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203
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204
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205
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206
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include/start_slave.inc
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include/sync_with_master_gtid.inc
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SELECT * FROM t1 ORDER BY a;
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a b
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1 2
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2 6
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3 3
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4 4
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5 5
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SELECT * FROM t2 ORDER BY a;
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a c
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1 NULL
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2 NULL
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3 NULL
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4 NULL
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5 5
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6 6
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SELECT * FROM t3 ORDER BY c;
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c
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1
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201
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202
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203
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204
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205
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206
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*** Test @@replicate_allow_parallel. ***
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include/stop_slave.inc
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UPDATE t1 SET b=10 WHERE a=3;
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SET SESSION replicate_allow_parallel=0;
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UPDATE t1 SET b=20 WHERE a=3;
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UPDATE t1 SET b=30 WHERE a=3;
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UPDATE t1 SET b=50 WHERE a=3;
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UPDATE t1 SET b=80 WHERE a=3;
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UPDATE t1 SET b=130 WHERE a=3;
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UPDATE t1 SET b=210 WHERE a=3;
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UPDATE t1 SET b=340 WHERE a=3;
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UPDATE t1 SET b=550 WHERE a=3;
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UPDATE t1 SET b=890 WHERE a=3;
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SET SESSION replicate_allow_parallel=1;
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SELECT * FROM t1 ORDER BY a;
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a b
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1 2
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2 6
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3 890
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4 4
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5 5
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include/save_master_gtid.inc
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include/start_slave.inc
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include/sync_with_master_gtid.inc
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SELECT * FROM t1 ORDER BY a;
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a b
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1 2
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2 6
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3 890
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4 4
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5 5
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status
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Ok, no retry
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*** Test that we do not replicate in parallel transactions that had row lock waits on the master ***
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include/stop_slave.inc
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BEGIN;
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UPDATE t1 SET b=b+1 WHERE a=3;
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SET debug_sync='thd_report_wait_for SIGNAL waiting1';
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UPDATE t1 SET b=1001 WHERE a=3;
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SET debug_sync='now WAIT_FOR waiting1';
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BEGIN;
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UPDATE t1 SET b=1002 WHERE a=5;
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SET debug_sync='thd_report_wait_for SIGNAL waiting2';
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UPDATE t1 SET b=102 WHERE a=3;
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SET debug_sync='now WAIT_FOR waiting2';
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UPDATE t1 SET b=1000 WHERE a=1;
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SET debug_sync='thd_report_wait_for SIGNAL waiting3';
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UPDATE t1 SET b=1003 WHERE a=5;
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SET debug_sync='now WAIT_FOR waiting3';
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SET debug_sync='thd_report_wait_for SIGNAL waiting4';
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UPDATE t1 SET b=1004 WHERE a=3;
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SET debug_sync='now WAIT_FOR waiting4';
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SET debug_sync='thd_report_wait_for SIGNAL waiting5';
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UPDATE t1 SET b=1005 WHERE a=5;
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SET debug_sync='now WAIT_FOR waiting5';
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SET debug_sync='thd_report_wait_for SIGNAL waiting6';
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UPDATE t1 SET b=1006 WHERE a=1;
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SET debug_sync='now WAIT_FOR waiting6';
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SET debug_sync='thd_report_wait_for SIGNAL waiting7';
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UPDATE t1 SET b=1007 WHERE a=5;
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SET debug_sync='now WAIT_FOR waiting7';
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SET debug_sync='thd_report_wait_for SIGNAL waiting8';
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UPDATE t1 SET b=1008 WHERE a=3;
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SET debug_sync='now WAIT_FOR waiting8';
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COMMIT;
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COMMIT;
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SET debug_sync='RESET';
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SELECT * FROM t1 ORDER BY a;
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a b
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1 1006
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2 6
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3 1008
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4 4
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5 1007
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include/save_master_gtid.inc
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include/start_slave.inc
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include/sync_with_master_gtid.inc
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SELECT * FROM t1 ORDER BY a;
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a b
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1 1006
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2 6
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3 1008
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4 4
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5 1007
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status
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Ok, no retry
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*** Test that we replicate correctly when using READ COMMITTED and binlog_format=MIXED on the slave ***
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include/stop_slave.inc
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SET @old_format= @@GLOBAL.binlog_format;
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SET GLOBAL binlog_format= MIXED;
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SET @old_isolation= @@GLOBAL.tx_isolation;
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SET GLOBAL TRANSACTION ISOLATION LEVEL READ COMMITTED;
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SET GLOBAL slave_parallel_threads=0;
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SET GLOBAL slave_parallel_threads=10;
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DROP TABLE t1, t2;
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CREATE TABLE t1 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
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CREATE TABLE t2 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (1,0), (2,0), (3,0);
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INSERT INTO t2 VALUES (1,0), (2,0);
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INSERT INTO t1 SELECT 4, COUNT(*) FROM t2;
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INSERT INTO t2 SELECT 4, COUNT(*) FROM t1;
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INSERT INTO t1 SELECT 5, COUNT(*) FROM t2;
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INSERT INTO t2 SELECT 5, COUNT(*) FROM t1;
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INSERT INTO t2 SELECT 6, COUNT(*) FROM t1;
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INSERT INTO t1 SELECT 6, COUNT(*) FROM t2;
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INSERT INTO t1 SELECT 7, COUNT(*) FROM t2;
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INSERT INTO t2 SELECT 7, COUNT(*) FROM t1;
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INSERT INTO t2 SELECT 8, COUNT(*) FROM t1;
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INSERT INTO t1 SELECT 8, COUNT(*) FROM t2;
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INSERT INTO t2 SELECT 9, COUNT(*) FROM t1;
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INSERT INTO t1 SELECT 9, COUNT(*) FROM t2;
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INSERT INTO t1 SELECT 10, COUNT(*) FROM t2;
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INSERT INTO t2 SELECT 10, COUNT(*) FROM t1;
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SELECT * FROM t1 ORDER BY a;
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a b
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1 0
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2 0
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3 0
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4 2
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5 3
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6 5
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7 5
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8 7
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9 8
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10 8
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SELECT * FROM t2 ORDER BY a;
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a b
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1 0
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2 0
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4 4
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5 5
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6 5
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7 7
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8 7
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9 8
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10 10
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include/save_master_gtid.inc
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include/start_slave.inc
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include/sync_with_master_gtid.inc
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SELECT * FROM t1 ORDER BY a;
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a b
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1 0
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2 0
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3 0
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4 2
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5 3
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6 5
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7 5
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8 7
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9 8
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10 8
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SELECT * FROM t2 ORDER BY a;
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a b
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1 0
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2 0
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4 4
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5 5
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6 5
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7 7
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8 7
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9 8
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10 10
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include/stop_slave.inc
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SET GLOBAL binlog_format= @old_format;
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SET GLOBAL tx_isolation= @old_isolation;
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include/start_slave.inc
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include/stop_slave.inc
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SET GLOBAL slave_parallel_mode=@old_parallel_mode;
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SET GLOBAL slave_parallel_threads=@old_parallel_threads;
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include/start_slave.inc
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DROP TABLE t1, t2, t3;
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include/rpl_end.inc
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