《Mysql學(xué)習(xí)MySQL中主從復(fù)制重復(fù)鍵問(wèn)題修復(fù)方法》要點(diǎn)：
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-------------------quote begin------------------------ 3. If you decide that you can skip the next statement from the master, issue the following statements: mysql> SET GLOBAL SQL_SLAVE_SKIP_COUNTER = n; mysql> START SLAVE; The value of n should be 1 if the next statement from the master does not use AUTO_INCREMENT or LAST_INSERT_ID(). Otherwise, the value should be 2. The reason for using a value of 2 for statements that use AUTO_INCREMENT or LAST_INSERT_ID() is that they take two events in the binary log of the master.MYSQL入門(mén)

-------------------quote end------------------------MYSQL入門(mén)

MySQL文檔中的意思是當(dāng)master傳到slave的語(yǔ)句中要用到auto_increment,或者last_insert_id()時(shí),需要skip兩個(gè)event. 但實(shí)際情況并非如此MYSQL入門(mén)

測(cè)試過(guò)程如下: 172.16.161.26 為master 172.16.161.15 為slave 同步c2cdb,初始狀態(tài)okMYSQL入門(mén)

1. 在master上創(chuàng)建測(cè)試表MYSQL入門(mén)

mysql> create table tmp_test_0208(id int not null auto_increment,name varchar(30),primary key(id)) engine=innodb;
Query OK, 0 rows affected (0.20 sec)

2, 在salve上insert 3條記錄MYSQL入門(mén)

mysql> insert into tmp_test_0208 values(1,'a'),(2,'b'),(3,'c');
Query OK, 3 rows affected (0.00 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> select * from tmp_test_0208;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 2 | b |
| 3 | c |
+----+------+
3 rows in set (0.00 sec)

3, 在master上insert 3條記錄 MYSQL入門(mén)

mysql> insert into tmp_test_0208(name) values('a'),('b'),('c');
Query OK, 3 rows affected (0.02 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> select * from tmp_test_0208;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 2 | b |
| 3 | c |
+----+------+
3 rows in set (0.00 sec)

4,? slave 的sql thread 中止MYSQL入門(mén)

/usr/local/mysql/bin/mysql -uroot -pxxx c2cdb -s -e "show slave status\G" |egrep "Slave_IO_Running|Sl
ave_SQL_Running"
Slave_IO_Running: Yes
Slave_SQL_Running: No

5,? skip next statemate后start slave正常 MYSQL入門(mén)

mysql> SET GLOBAL SQL_SLAVE_SKIP_COUNTER = 1 ;
Query OK, 0 rows affected (0.00 sec)
mysql> slave start;
Query OK, 0 rows affected (0.00 sec)
/usr/local/mysql/bin/mysql -uroot -pxxx c2cdb -s -e "show slave status\G" |egrep "Slave_IO_Running|Sl
ave_SQL_Running"
Slave_IO_Running: Yes
Slave_SQL_Running: Yes

slave端errlog如下： 070208 16:07:59[ERROR] Slave: Error 'Duplicate entry '1' for key 1' on query. Default database: 'c2cdb'. Query: 'insert into tmp_te st_0208(name) values('a'),('b'),('c')', Error_code: 1062MYSQL入門(mén)

070208 16:07:59 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE ?START". We stopped at log 'db_auction1-bin.000203' position 14215101MYSQL入門(mén)

070208 16:09:59 [Note] Slave SQL thread initialized, starting replication in log 'db_auction1-bin.000203' at position 14215101, rela y log './db_auction1_b-relay-bin.000457' position: 200682931MYSQL入門(mén)

?MYSQL入門(mén)

master羰binlog中相應(yīng)的記錄如下：MYSQL入門(mén)

# at 14215101 #070208 16:08:00 server id 1? log_pos 14215101? Intvar SET INSERT_ID=1; # at 14215129 #070208 16:08:00 server id 1? log_pos 14215129? Query?? thread_id=2744782?????? exec_time=0???? error_code=0 SET TIMESTAMP=1170922080; insert into tmp_test_0208(name) values('a'),('b'),('c');MYSQL入門(mén)

總結(jié)：使用SET GLOBAL SQL_SLAVE_SKIP_COUNTER 命令跳過(guò)失敗的SQLMYSQL入門(mén)

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