先看下slave_exec_mod官方描述
| Command-Line Format | --slave-exec-mode=mode |
| Option-File Format | slave_exec_mode |
| System Variable Name | slave_exec_mode |
| Variable Scope | Global |
| Dynamic Variable | Yes |
| | Permitted Values |
| Type | enumeration |
| Default | STRICT (ALL) |
| Default | IDEMPOTENT (NDB) |
| Valid Values | IDEMPOTENT |
STRICT |
Controls whether IDEMPOTENT or STRICT mode is used in replication conflict resolution and error checking.IDEMPOTENT mode causes suppression of duplicate-key and no-key-found errors.
This mode is needed for multi-master replication, circular replication, and some other special replication scenarios for MySQL Cluster Replication.[plain] view plaincopyprint?
SLAVE@root@test 07:21:41>show variables like "slave_exec_mode";
+-----------------+--------+
| Variable_name | Value |
+-----------------+--------+
| slave_exec_mode | STRICT |
+-----------------+--------+
1 row in set (0.00 sec)
SLAVE@root@test 07:21:42> SLAVE@root@test 07:21:41>show variables like "slave_exec_mode";
+-----------------+--------+
| Variable_name | Value |
+-----------------+--------+
| slave_exec_mode | STRICT |
+-----------------+--------+
1 row in set (0.00 sec)SLAVE@root@test 07:21:42>
意思是说slave_exec_mod默认是STRICT可选值是IDEMPOTENT,在多主大型复制系统中建议使用IDEMPOTENT值,它避免duplicate-key 和 no-key-found等错误。这个参数是动态的,可以直接修改。[plain] view plaincopyprint?
SLAVE@root@test 07:39:58>show variables like "slave_exec_mode";
+-----------------+------------+
| Variable_name | Value |
+-----------------+------------+
| slave_exec_mode | IDEMPOTENT |
+-----------------+------------+
1 row in set (0.00 sec)
SLAVE@root@test 07:40:09>set global slave_exec_mode="strict";
Query OK, 0 rows affected (0.00 sec)
SLAVE@root@test 07:40:23>show variables like "slave_exec_mode";
+-----------------+--------+
| Variable_name | Value |
+-----------------+--------+
| slave_exec_mode | STRICT |
+-----------------+--------+
1 row in set (0.00 sec)
SLAVE@root@test 07:40:24>set global slave_exec_mode="IDEMPOTENT";
Query OK, 0 rows affected (0.00 sec) 统计MySQL binlog中的DML语句MySQL禁用binlog中的语句相关资讯 MySQL参数 slave_exec_mod
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