1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
|
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
|
