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Andrei Elkin's avatar
MDEV-15152 Optimistic parallel slave doesnt cope well with START SLAVE UNTIL  
Andrei Elkin committed
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include/master-slave.inc
[connection master]
connection slave;
include/stop_slave.inc
RESET MASTER;
RESET SLAVE;
connection master;
RESET MASTER;
CREATE TABLE t1 (a int primary key, b text) ENGINE=InnoDB;
INSERT INTO t1 SET a=25, b='trx0';
connection slave;
include/start_slave.inc
connection master;
connection slave;
include/stop_slave.inc
ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
SET GLOBAL slave_parallel_threads=2;
SET @old_parallel_mode=@@GLOBAL.slave_parallel_mode;
SET GLOBAL slave_parallel_mode='optimistic';
connection slave;
SET @old_max_relay_log_size = @@global.max_relay_log_size;
SET @@global.max_relay_log_size=4096;
connection master;
BEGIN;
INSERT INTO t1 SET a=1, b='trx1';
INSERT INTO t1 SET a=2, b='trx1';
INSERT INTO t1 SET a=3, b='trx1';
INSERT INTO t1 SET a=4, b='trx1';
INSERT INTO t1 SET a=5, b='trx1';
INSERT INTO t1 SET a=6, b='trx1';
INSERT INTO t1 SET a=7, b='trx1';
INSERT INTO t1 SET a=8, b='trx1';
INSERT INTO t1 SET a=9, b='trx1';
INSERT INTO t1 SET a=10, b='trx1';
INSERT INTO t1 SET a=11, b='trx1';
INSERT INTO t1 SET a=12, b='trx1';
INSERT INTO t1 SET a=13, b='trx1';
INSERT INTO t1 SET a=14, b='trx1';
INSERT INTO t1 SET a=15, b='trx1';
INSERT INTO t1 SET a=16, b='trx1';
INSERT INTO t1 SET a=17, b='trx1';
INSERT INTO t1 SET a=18, b='trx1';
INSERT INTO t1 SET a=19, b='trx1';
INSERT INTO t1 SET a=20, b='trx1';
INSERT INTO t1 SET a=21, b='trx1';
INSERT INTO t1 SET a=22, b='trx1';
INSERT INTO t1 SET a=23, b='trx1';
INSERT INTO t1 SET a=24, b='trx1';
COMMIT;
FLUSH LOGS;
BEGIN;
UPDATE t1 SET b='trx2_0' WHERE a = 25;
UPDATE t1 SET b='trx2' WHERE a = 25;
COMMIT;
INSERT INTO t1 SET a=26,b='trx3';
*** case 1 UNTIL inside trx2
connection slave1;
BEGIN;
INSERT INTO t1 SET a= 1;
connection slave;
SELECT <pos_0> <= <pos_until> AND <pos_until> < <pos_trx2> as "pos_until < trx0 and is within trx2";
pos_until < trx0 and is within trx2
1
CHANGE MASTER TO MASTER_USE_GTID=no;
START SLAVE UNTIL MASTER_LOG_FILE = 'file_2', MASTER_LOG_POS = <pos_until>;
connection slave1;
ROLLBACK;
Proof 1: Correct stop
connection slave;
include/wait_for_slave_sql_to_stop.inc
SELECT count(*) = 1 as 'trx2 is committed' FROM t1 WHERE b = 'trx2';
trx2 is committed
1
SELECT count(*) = 0 as 'trx3 is not committed' FROM t1 WHERE b = 'trx3';
trx3 is not committed
1
Proof 2: Resume works out
include/start_slave.inc
connection master;
connection slave;
*** case 2 UNTIL inside trx2
connection slave;
DELETE FROM t1 WHERE a <> 25;
UPDATE t1 SET b='trx0' WHERE a = 25;
connection slave1;
BEGIN;
INSERT INTO t1 SET a= 1;
connection slave;
include/stop_slave.inc
SELECT <pos_0> <= <pos_until> AND <pos_until> < <pos_trx2> as "pos_until >= trx0 and is within trx2";
pos_until >= trx0 and is within trx2
1
CHANGE MASTER TO MASTER_LOG_FILE = 'file_1', MASTER_LOG_POS = <pos_trx0>, MASTER_USE_GTID=no;
START SLAVE UNTIL MASTER_LOG_FILE = 'file_2', MASTER_LOG_POS = <pos_until>;
connection slave1;
ROLLBACK;
Proof 1: Correct stop
connection slave;
include/wait_for_slave_sql_to_stop.inc
SELECT count(*) = 1 as 'trx2 is committed' FROM t1 WHERE b = 'trx2';
trx2 is committed
1
SELECT count(*) = 0 as 'trx3 is not committed' FROM t1 WHERE b = 'trx3';
trx3 is not committed
1
Proof 2: Resume works out
include/start_slave.inc
connection master;
connection slave;
*** case 3 UNTIL inside trx1
connection slave;
DELETE FROM t1 WHERE a <> 25;
UPDATE t1 SET b='trx0' WHERE a = 25;
connection slave1;
BEGIN;
INSERT INTO t1 SET a= 1; # block trx1;
connection slave;
include/stop_slave.inc
SELECT <pos_until> < <pos_0> as "pos_until before trx2 start position";
pos_until before trx2 start position
1
CHANGE MASTER TO MASTER_LOG_FILE = 'file_1', MASTER_LOG_POS = <pos_trx0>, MASTER_USE_GTID=no;
START SLAVE UNTIL MASTER_LOG_FILE = 'file_2', MASTER_LOG_POS = <pos_until>;
connection slave1;
ROLLBACK;
Proof 1: Correct stop
connection slave;
include/wait_for_slave_sql_to_stop.inc
SELECT count(*) = 25-1 as 'trx1 is committed' FROM t1 WHERE b = 'trx1';
trx1 is committed
1
SELECT count(*) = 0 as 'trx2 is not committed' FROM t1 WHERE b = 'trx2';
trx2 is not committed
1
Proof 2: Resume works out
include/start_slave.inc
connection master;
connection slave;
*** case 4 Relay-log UNTIL inside trx1
connection slave;
DELETE FROM t1 WHERE a <> 25;
UPDATE t1 SET b='trx0' WHERE a = 25;
connection slave1;
BEGIN;
INSERT INTO t1 SET a= 1; # block trx1;
connection slave;
include/stop_slave.inc
CHANGE MASTER TO MASTER_LOG_FILE = 'file_1', MASTER_LOG_POS = <pos_trx0>, MASTER_USE_GTID=no;
START SLAVE IO_THREAD;
include/wait_for_slave_io_to_start.inc
START SLAVE UNTIL RELAY_LOG_FILE = 'file_2', RELAY_LOG_POS = <pos_until>;
connection slave1;
ROLLBACK;
Proof 1: Correct stop
connection slave;
include/wait_for_slave_sql_to_stop.inc
SELECT count(*) = 25-1 as 'trx1 is committed' FROM t1 WHERE b = 'trx1';
trx1 is committed
1
SELECT count(*) = 0 as 'trx2 is not committed' FROM t1 WHERE b = 'trx2';
trx2 is not committed
1
Proof 2: Resume works out
include/start_slave.inc
connection master;
connection slave;
*** case 5 Relay-log UNTIL inside a "big" trx that spawns few relay logs
connection master;
CREATE TABLE t2 (a TEXT) ENGINE=InnoDB;
FLUSH LOGS;
connection slave;
connection slave;
include/stop_slave.inc
connection master;
BEGIN;
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
INSERT INTO t2 SET a=repeat('a',1024);
COMMIT;
INSERT INTO t2 SET a='a';
connection slave;
START SLAVE IO_THREAD;
include/wait_for_slave_io_to_start.inc
START SLAVE UNTIL RELAY_LOG_FILE = 'file_2', RELAY_LOG_POS = <pos_until>;
Proof 1: Correct stop
connection slave;
include/wait_for_slave_sql_to_stop.inc
Proof 2: Resume works out
include/start_slave.inc
connection master;
connection slave;
include/diff_tables.inc [master:t2,slave:t2]
*** case 6 Relay-log UNTIL inside a small trx inside a sequence of relay logs
connection slave;
include/stop_slave.inc
connection master;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
BEGIN;
DELETE FROM t2 LIMIT 1;
COMMIT;
COMMIT;
connection slave;
START SLAVE IO_THREAD;
include/wait_for_slave_io_to_start.inc
connection master;
include/sync_slave_io_with_master.inc
connection slave;
START SLAVE UNTIL RELAY_LOG_FILE = 'file_2', RELAY_LOG_POS = <pos_until>;
Proof 1: Correct stop
connection slave;
include/wait_for_slave_sql_to_stop.inc
Proof 2: Resume works out
include/start_slave.inc
connection master;
connection slave;
include/diff_tables.inc [master:t2,slave:t2]
connection slave;
include/stop_slave.inc
SET GLOBAL max_relay_log_size=@old_max_relay_log_size;
SET GLOBAL slave_parallel_mode=@old_parallel_mode;
SET GLOBAL slave_parallel_threads=@old_parallel_threads;
include/start_slave.inc
connection master;
DROP TABLE t1, t2;
connection slave;
include/rpl_end.inc
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