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1.从一个大神那边得到一张图片，SQL线程应用中继日志流程，下面就实验验证一下
2.验证有PK表情况
在主库创建表结构
CREATE TABLE `table_pk` (
`id` int(11) NOT NULL ,
`name` varchar(20) NOT NULL ,
`age` tinyint NOT NULL ,
`sex` tinyint NOT NULL COMMENT ‘0,man,1,woman‘ ,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
插入测试数据
insert into table_pk (`id`,`name`,`age`,`sex`) values(111,‘zhangsan‘,20,0);
insert into table_pk (`id`,`name`,`age`,`sex`) values(222,‘lisi‘,22,1);
insert into table_pk (`id`,`name`,`age`,`sex`) values(333,‘wangwu‘,22,1);
insert into table_pk (`id`,`name`,`age`,`sex`) values(444,‘lilei‘,32,0);
insert into table_pk (`id`,`name`,`age`,`sex`) values(555,‘hanmeimei‘,30,1);
(dg6)root@localhost [(none)]> use mytest; (dg6)root@localhost [mytest]> select * from table_pk; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsan | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | +-----+-----------+-----+-----+ 5 rows in set (0.00 sec) (dg6)root@localhost [mytest]> show global variables like ‘%binlog_format%‘; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | binlog_format | ROW | +---------------+-------+ 1 row in set (0.00 sec)
那么我们去从库看看
(dg7)root@localhost [mytest]> select * from table_pk; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsan | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | +-----+-----------+-----+-----+ 5 rows in set (0.00 sec) (dg7)root@localhost [mytest]> show global variables like ‘%binlog_format%‘; +--------------------------+-------------------+ | Variable_name | Value | +--------------------------+-------------------+ | binlog_format | ROW | +--------------------------+-------------------+ 8 rows in set (0.00 sec) (dg7)root@localhost [mytest]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.80.106 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: dg6-logbin.000001 Read_Master_Log_Pos: 4469 Relay_Log_File: dg7-relay-bin.000002 Relay_Log_Pos: 4681 Relay_Master_Log_File: dg6-logbin.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 4469 Relay_Log_Space: 4883 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1 Master_UUID: b888e1ea-9739-11e4-a24e-000c29b24887 Master_Info_File: /data/mydata/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: b888e1ea-9739-11e4-a24e-000c29b24887:1-17 Executed_Gtid_Set: a9926b45-975d-11e4-a339-000c29b24888:1-9, b888e1ea-9739-11e4-a24e-000c29b24887:1-17 Auto_Position: 1 1 row in set (0.00 sec)
数据是复制过来的，MySQL主从复制是正常的，那么我们为了验证MySQL复制SQL线程是居于刚才那张图的流程，有主键，就按主键更新匹配更新记录。
那么我们在从库修改一行数据，故意制造不一致。
(dg7)root@localhost [mytest]> UPDATE `table_pk` SET `name`=‘laowang‘ WHERE `id`=333； Query OK, 0 rows affected (0.00 sec) Rows matched: 1 Changed: 0 Warnings: 0 (dg7)root@localhost [mytest]> select * from table_pk; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsan | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | laowang | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | +-----+-----------+-----+-----+ 5 rows in set (0.00 sec)
这时候主从数据不一致了
主库 (dg6)root@localhost [mytest]> select * from table_pk where id=333; +-----+--------+-----+-----+ | id | name | age | sex | +-----+--------+-----+-----+ | 333 | wangwu | 22 | 1 | +-----+--------+-----+-----+ 1 row in set (0.00 sec) 从库 (dg7)root@localhost [mytest]> select * from table_pk where id=333; +-----+---------+-----+-----+ | id | name | age | sex | +-----+---------+-----+-----+ | 333 | laowang | 22 | 1 | +-----+---------+-----+-----+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]>
那么，我们在主库更新一行数据。
(dg6)root@localhost [mytest]> UPDATE `table_pk` SET `name`=‘wangzi‘ WHERE `id`=333; Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg6)root@localhost [mytest]> select * from table_pk where id=333; +-----+--------+-----+-----+ | id | name | age | sex | +-----+--------+-----+-----+ | 333 | wangzi | 22 | 1 | +-----+--------+-----+-----+ 1 row in set (0.00 sec)
我们来看一下从库状态，是不是主库的更新给复制过来了，见证奇迹的时候到了
###############################################
(dg7)root@localhost [mytest]> select * from table_pk where id=333; +-----+---------+-----+-----+ | id | name | age | sex | +-----+---------+-----+-----+ | 333 | laowang | 22 | 1 | +-----+---------+-----+-----+ 1 row in set (0.00 sec)
######################### 神奇的是主库的更新过来了############################################# (dg7)root@localhost [mytest]> select * from table_pk where id=333; +-----+--------+-----+-----+ | id | name | age | sex | +-----+--------+-----+-----+ | 333 | wangzi | 22 | 1 | +-----+--------+-----+-----+ 1 row in set (0.00 sec)
#########################那么看一下MySQL主从复制状态看看，也是正常的###################### (dg7)root@localhost [mytest]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.80.106 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: dg6-logbin.000001 Read_Master_Log_Pos: 5249 Relay_Log_File: dg7-relay-bin.000002 Relay_Log_Pos: 5461 Relay_Master_Log_File: dg6-logbin.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 5249 Relay_Log_Space: 5663 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1 Master_UUID: b888e1ea-9739-11e4-a24e-000c29b24887 Master_Info_File: /data/mydata/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: b888e1ea-9739-11e4-a24e-000c29b24887:1-20 Executed_Gtid_Set: a9926b45-975d-11e4-a339-000c29b24888:1-11, b888e1ea-9739-11e4-a24e-000c29b24887:1-20 Auto_Position: 1 1 row in set (0.00 sec) (dg7)root@localhost [mytest]>
3.验证没有索引的情况
主库创建表和插入记录
CREATE TABLE `table_index` ( `id` int(11) NOT NULL, `name` varchar(20) NOT NULL, `age` tinyint(4) NOT NULL, `sex` tinyint(4) NOT NULL COMMENT ‘0,man,1,woman‘, ) ENGINE=InnoDB (dg6)root@localhost [mytest]> select * from table_index; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsan | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | +-----+-----------+-----+-----+ 5 rows in set (0.00 sec) (dg6)root@localhost [mytest]>
从库看看
(dg7)root@localhost [mytest]> select * from table_index; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsan | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | +-----+-----------+-----+-----+ 5 rows in set (0.00 sec)
我们在从库继续搞破坏，把age为22的记录修改为laowang，这时候主从已经不一致了。
(dg7)root@localhost [mytest]> select * from table_index where age=‘22‘; +-----+--------+-----+-----+ | id | name | age | sex | +-----+--------+-----+-----+ | 333 | wangwu | 22 | 1 | +-----+--------+-----+-----+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]> update table_index set name=‘laowang‘ where age=22; Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg7)root@localhost [mytest]> select * from table_index where age=22; +-----+---------+-----+-----+ | id | name | age | sex | +-----+---------+-----+-----+ | 333 | laowang | 22 | 1 | +-----+---------+-----+-----+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]>
那么我们还是在主库更新一下记录。
(dg6)root@localhost [mytest]> select * from table_index where name=‘lisi‘; +-----+------+-----+-----+ | id | name | age | sex | +-----+------+-----+-----+ | 222 | lisi | 22 | 1 | +-----+------+-----+-----+ 1 row in set (0.00 sec) (dg6)root@localhost [mytest]> update table_index set age=30 where name=‘lisi‘; Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg6)root@localhost [mytest]> select * from table_index where name=‘lisi‘; +-----+------+-----+-----+ | id | name | age | sex | +-----+------+-----+-----+ | 222 | lisi | 30 | 1 | +-----+------+-----+-----+ 1 row in set (0.00 sec) (dg6)root@localhost [mytest]>
回到从库看看，数据没有更新过来，主从复制也是异常的
(dg7)root@localhost [mytest]> select * from table_index where name=‘lisi‘; +-----+------+-----+-----+ | id | name | age | sex | +-----+------+-----+-----+ | 222 | lisi | 33 | 1 | +-----+------+-----+-----+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.80.106 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: dg6-logbin.000001 Read_Master_Log_Pos: 7376 Relay_Log_File: dg7-relay-bin.000003 Relay_Log_Pos: 724 Relay_Master_Log_File: dg6-logbin.000001 Slave_IO_Running: Yes Slave_SQL_Running: No Replicate_Do_DB: Replicate_Ignore_DB: mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 1032 Last_Error: Could not execute Update_rows event on table mytest.table_index; Can‘t find record in ‘table_index‘, Error_code: 1032; Corrupted replication event was detected, Error_code: 1610; handler error HA_ERR_END_OF_FILE; the event‘s master log dg6-logbin.000001, end_log_pos 7345 Skip_Counter: 0 Exec_Master_Log_Pos: 7112 Relay_Log_Space: 8090 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: NULL Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 1032 Last_SQL_Error: Could not execute Update_rows event on table mytest.table_index; Can‘t find record in ‘table_index‘, Error_code: 1032; Corrupted replication event was detected, Error_code: 1610; handler error HA_ERR_END_OF_FILE; the event‘s master log dg6-logbin.000001, end_log_pos 7345 Replicate_Ignore_Server_Ids: Master_Server_Id: 1 Master_UUID: b888e1ea-9739-11e4-a24e-000c29b24887 Master_Info_File: /data/mydata/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: 150425 08:30:49 Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: b888e1ea-9739-11e4-a24e-000c29b24887:1-28 Executed_Gtid_Set: a9926b45-975d-11e4-a339-000c29b24888:1-14, b888e1ea-9739-11e4-a24e-000c29b24887:1-27 Auto_Position: 1 1 row in set (0.00 sec) (dg7)root@localhost [mytest]>
4.验证有唯一索引情况
测试方法都一样，下面步骤我都就贴结果了。
(dg6)root@localhost [mytest]> select * from table_index; +-----+-----+-----------+-----+-----+ | id | sid | name | age | sex | +-----+-----+-----------+-----+-----+ | 111 | 1 | zhangsan | 20 | 0 | | 222 | 2 | lisi | 30 | 1 | | 333 | 3 | wangzi | 22 | 1 | | 444 | 4 | lilei | 32 | 0 | | 555 | 5 | hanmeimei | 30 | 1 | +-----+-----+-----------+-----+-----+ 5 rows in set (0.00 sec) (dg6)root@localhost [mytest]> select * from table_index where sid=3; +-----+-----+--------+-----+-----+ | id | sid | name | age | sex | +-----+-----+--------+-----+-----+ | 333 | 3 | wangzi | 22 | 1 | +-----+-----+--------+-----+-----+ 1 row in set (0.00 sec) (dg6)root@localhost [mytest]> update table_index set name=‘wangwu‘ where sid=3; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg6)root@localhost [mytest]> select * from table_index where sid=3; +-----+-----+--------+-----+-----+ | id | sid | name | age | sex | +-----+-----+--------+-----+-----+ | 333 | 3 | wangwu | 22 | 1 | +-----+-----+--------+-----+-----+ 1 row in set (0.00 sec) (dg6)root@localhost [mytest]>
从库看看，能更新过来，而且主从复制状态是正常的
(dg7)root@localhost [mytest]> select * from table_index; +-----+-----+-----------+-----+-----+ | id | sid | name | age | sex | +-----+-----+-----------+-----+-----+ | 111 | 1 | zhangsan | 20 | 0 | | 222 | 2 | lisi | 30 | 1 | | 333 | 3 | wangzi | 22 | 1 | | 444 | 4 | lilei | 32 | 0 | | 555 | 5 | hanmeimei | 30 | 1 | +-----+-----+-----------+-----+-----+ 5 rows in set (0.00 sec) (dg7)root@localhost [mytest]> update table_index set name=‘laowang‘ where sid=3; Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg7)root@localhost [mytest]> select * from table_index where sid=3; +-----+-----+---------+-----+-----+ | id | sid | name | age | sex | +-----+-----+---------+-----+-----+ | 333 | 3 | laowang | 22 | 1 | +-----+-----+---------+-----+-----+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.80.106 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: dg6-logbin.000001 Read_Master_Log_Pos: 13038 Relay_Log_File: dg7-relay-bin.000005 Relay_Log_Pos: 5841 Relay_Master_Log_File: dg6-logbin.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 13038 Relay_Log_Space: 6615 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1 Master_UUID: b888e1ea-9739-11e4-a24e-000c29b24887 Master_Info_File: /data/mydata/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: b888e1ea-9739-11e4-a24e-000c29b24887:1-52 Executed_Gtid_Set: a9926b45-975d-11e4-a339-000c29b24888:1-26, b888e1ea-9739-11e4-a24e-000c29b24887:1-52 Auto_Position: 1 1 row in set (0.00 sec) (dg7)root@localhost [mytest]> select * from table_index where sid=3; +-----+-----+--------+-----+-----+ | id | sid | name | age | sex | +-----+-----+--------+-----+-----+ | 333 | 3 | wangwu | 22 | 1 | +-----+-----+--------+-----+-----+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.80.106 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: dg6-logbin.000001 Read_Master_Log_Pos: 13302 Relay_Log_File: dg7-relay-bin.000005 Relay_Log_Pos: 6105 Relay_Master_Log_File: dg6-logbin.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 13302 Relay_Log_Space: 6879 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1 Master_UUID: b888e1ea-9739-11e4-a24e-000c29b24887 Master_Info_File: /data/mydata/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: b888e1ea-9739-11e4-a24e-000c29b24887:1-53 Executed_Gtid_Set: a9926b45-975d-11e4-a339-000c29b24888:1-26, b888e1ea-9739-11e4-a24e-000c29b24887:1-53 Auto_Position: 1 1 row in set (0.00 sec) (dg7)root@localhost [mytest]>
5.验证有主键和有普通索引情况
(dg6)root@localhost [mytest]> select * from table_key; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsan | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | | 666 | lucy | 30 | 1 | | 777 | lili | 30 | 1 | | 888 | lintao | 32 | 0 | +-----+-----------+-----+-----+ 8 rows in set (0.00 sec) (dg6)root@localhost [mytest]> update table_key set name=‘zhangsir‘ where age=20; Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg6)root@localhost [mytest]> select * from table_key; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsir | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | | 666 | lucy | 30 | 1 | | 777 | lili | 30 | 1 | | 888 | lintao | 32 | 0 | +-----+-----------+-----+-----+ 8 rows in set (0.00 sec) (dg6)root@localhost [mytest]>
从库看看
(dg7)root@localhost [mytest]> select * from table_key; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsan | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | | 666 | lucy | 30 | 1 | | 777 | lili | 30 | 1 | | 888 | lintao | 32 | 0 | +-----+-----------+-----+-----+ 8 rows in set (0.00 sec) (dg7)root@localhost [mytest]> desc update table_key set name=‘xiaozhang‘ where age=20; +----+-------------+-----------+-------+---------------+-----------+---------+-------+------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-----------+-------+---------------+-----------+---------+-------+------+-------------+ | 1 | SIMPLE | table_key | range | age_index | age_index | 1 | const | 1 | Using where | +----+-------------+-----------+-------+---------------+-----------+---------+-------+------+-------------+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]> update table_key set name=‘xiaozhang‘ where age=20; Query OK, 1 row affected (0.03 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg7)root@localhost [mytest]> select * from table_key; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | xiaozhang | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | | 666 | lucy | 30 | 1 | | 777 | lili | 30 | 1 | | 888 | lintao | 32 | 0 | +-----+-----------+-----+-----+ 8 rows in set (0.00 sec) (dg7)root@localhost [mytest]> select * from table_key; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsir | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | | 666 | lucy | 30 | 1 | | 777 | lili | 30 | 1 | | 888 | lintao | 32 | 0 | +-----+-----------+-----+-----+ 8 rows in set (0.00 sec) (dg7)root@localhost [mytest]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.80.106 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: dg6-logbin.000001 Read_Master_Log_Pos: 16026 Relay_Log_File: dg7-relay-bin.000005 Relay_Log_Pos: 8829 Relay_Master_Log_File: dg6-logbin.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 16026 Relay_Log_Space: 9603 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1 Master_UUID: b888e1ea-9739-11e4-a24e-000c29b24887 Master_Info_File: /data/mydata/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: b888e1ea-9739-11e4-a24e-000c29b24887:1-63 Executed_Gtid_Set: a9926b45-975d-11e4-a339-000c29b24888:1-28, b888e1ea-9739-11e4-a24e-000c29b24887:1-63 Auto_Position: 1 1 row in set (0.00 sec) (dg7)root@localhost [mytest]>
6.验证只有普通索引情况
主库
(dg6)root@localhost [mytest]>select * from table_key where age=20; +-----+----------+-----+-----+ | id | name | age | sex | +-----+----------+-----+-----+ | 111 | zhangsir | 20 | 0 | +-----+----------+-----+-----+ 1 row in set (0.00 sec) (dg6)root@localhost [mytest]>update table_key set name=‘zhaoliu‘ where age=20; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg6)root@localhost [mytest]>select * from table_key where age=20; +-----+---------+-----+-----+ | id | name | age | sex | +-----+---------+-----+-----+ | 111 | zhaoliu | 20 | 0 | +-----+---------+-----+-----+ 1 row in set (0.00 sec)
从库
(dg7)root@localhost [mytest]> select * from table_key where age=20; +-----+----------+-----+-----+ | id | name | age | sex | +-----+----------+-----+-----+ | 111 | zhangsir | 20 | 0 | +-----+----------+-----+-----+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]> update table_key set name=‘zhangsan‘ where age=20; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg7)root@localhost [mytest]> select * from table_key where age=20; +-----+----------+-----+-----+ | id | name | age | sex | +-----+----------+-----+-----+ | 111 | zhangsan | 20 | 0 | +-----+----------+-----+-----+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]> select * from table_key where age=20; +-----+----------+-----+-----+ | id | name | age | sex | +-----+----------+-----+-----+ | 111 | zhangsan | 20 | 0 | +-----+----------+-----+-----+ 1 row in set (0.00 sec) (dg7)root@localhost [mytest]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.80.106 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: dg6-logbin.000001 Read_Master_Log_Pos: 16463 Relay_Log_File: dg7-relay-bin.000005 Relay_Log_Pos: 8993 Relay_Master_Log_File: dg6-logbin.000001 Slave_IO_Running: Yes Slave_SQL_Running: No Replicate_Do_DB: Replicate_Ignore_DB: mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 1032 Last_Error: Could not execute Update_rows event on table mytest.table_key; Can‘t find record in ‘table_key‘, Error_code: 1032; Column ‘name‘ cannot be null, Error_code: 1048; Column ‘age‘ cannot be null, Error_code: 1048; Column ‘sex‘ cannot be null, Error_code: 1048; handler error HA_ERR_END_OF_FILE; the event‘s master log dg6-logbin.000001, end_log_pos 16432 Skip_Counter: 0 Exec_Master_Log_Pos: 16190 Relay_Log_Space: 10040 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: NULL Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 1032 Last_SQL_Error: Could not execute Update_rows event on table mytest.table_key; Can‘t find record in ‘table_key‘, Error_code: 1032; Column ‘name‘ cannot be null, Error_code: 1048; Column ‘age‘ cannot be null, Error_code: 1048; Column ‘sex‘ cannot be null, Error_code: 1048; handler error HA_ERR_END_OF_FILE; the event‘s master log dg6-logbin.000001, end_log_pos 16432 Replicate_Ignore_Server_Ids: Master_Server_Id: 1 Master_UUID: b888e1ea-9739-11e4-a24e-000c29b24887 Master_Info_File: /data/mydata/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: 150425 09:43:27 Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: b888e1ea-9739-11e4-a24e-000c29b24887:1-65 Executed_Gtid_Set: a9926b45-975d-11e4-a339-000c29b24888:1-29, b888e1ea-9739-11e4-a24e-000c29b24887:1-64 Auto_Position: 1 1 row in set (0.00 sec) (dg7)root@localhost [mytest]>
7.binlog格式是sbr,mbr格式的时候（PS，因为我使用了GTID，所以找了另外两台机测试）
主库
(dg1)root@127.0.0.1 [mytest]> select * from table_key; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsan | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | | 666 | lucy | 30 | 1 | | 777 | lili | 30 | 1 | | 888 | lintao | 32 | 0 | +-----+-----------+-----+-----+ 8 rows in set (0.00 sec) (dg1)root@127.0.0.1 [mytest]> show global variables like ‘%binlog_format%‘; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | binlog_format | MIXED | +---------------+-------+ 1 row in set (0.00 sec) (dg1)root@127.0.0.1 [mytest]> select * from table_key; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangsan | 20 | 0 | | 222 | lisi | 22 | 1 | | 333 | wangwu | 22 | 1 | | 444 | lilei | 32 | 0 | | 555 | hanmeimei | 30 | 1 | | 666 | lucy | 30 | 1 | | 777 | lili | 30 | 1 | | 888 | lintao | 32 | 0 | +-----+-----------+-----+-----+ 8 rows in set (0.00 sec) (dg1)root@127.0.0.1 [mytest]> update table_key set name=‘zhangzong‘ where age=20; Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0
从库看一下
(dg2)root@127.0.0.1 [mytest]> select * from table_key where age=20; +-----+----------+-----+-----+ | id | name | age | sex | +-----+----------+-----+-----+ | 111 | zhangsan | 20 | 0 | +-----+----------+-----+-----+ 1 row in set (0.01 sec) (dg2)root@127.0.0.1 [mytest]> update table_key set name=‘zhangsir‘ where age=20; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg2)root@127.0.0.1 [mytest]> select * from table_key where age=20; +-----+----------+-----+-----+ | id | name | age | sex | +-----+----------+-----+-----+ | 111 | zhangsir | 20 | 0 | +-----+----------+-----+-----+ 1 row in set (0.00 sec) (dg2)root@127.0.0.1 [mytest]> select * from table_key where age=20; +-----+-----------+-----+-----+ | id | name | age | sex | +-----+-----------+-----+-----+ | 111 | zhangzong | 20 | 0 | +-----+-----------+-----+-----+ 1 row in set (0.00 sec) (dg2)root@127.0.0.1 [mytest]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.80.101 Master_User: repl Master_Port: 3307 Connect_Retry: 60 Master_Log_File: dg1.000001 Read_Master_Log_Pos: 3340 Relay_Log_File: mysql3307-relay-bin.000002 Relay_Log_Pos: 3355 Relay_Master_Log_File: dg1.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 3340 Relay_Log_Space: 3532 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 12 Master_UUID: fbc1bdf1-829b-11e4-9bdf-000c29b24882 Master_Info_File: /data/3307/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 1 row in set (0.00 sec) (dg2)root@127.0.0.1 [mytest]>
删除索引，再测试一下
(dg1)root@127.0.0.1 [mytest]> alter table table_key drop key age_index; Query OK, 0 rows affected (0.02 sec) Records: 0 Duplicates: 0 Warnings: 0 (dg1)root@127.0.0.1 [mytest]> insert into table_key (id,name,age,sex) values(999,‘user1‘,0); ERROR 1136 (21S01): Column count doesn‘t match value count at row 1 (dg1)root@127.0.0.1 [mytest]> insert into table_key (id,name,age,sex) values(999,‘user1‘,38,0); Query OK, 1 row affected (0.00 sec) (dg1)root@127.0.0.1 [mytest]> select * from table_key where age=38; +-----+-------+-----+-----+ | id | name | age | sex | +-----+-------+-----+-----+ | 999 | user1 | 38 | 0 | +-----+-------+-----+-----+ 1 row in set (0.00 sec) (dg1)root@127.0.0.1 [mytest]> update table_key set name=‘user3‘ where age=38; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg1)root@127.0.0.1 [mytest]>
从库看一下
(dg2)root@127.0.0.1 [mytest]> show create table table_key; +-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Table | Create Table | +-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | table_key | CREATE TABLE `table_key` ( `id` int(11) NOT NULL, `name` varchar(20) NOT NULL, `age` tinyint(4) NOT NULL, `sex` tinyint(4) NOT NULL COMMENT ‘0,man,1,woman‘ ) ENGINE=InnoDB DEFAULT CHARSET=utf8 | +-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec) (dg2)root@127.0.0.1 [mytest]> select * from table_key where age=38; +-----+-------+-----+-----+ | id | name | age | sex | +-----+-------+-----+-----+ | 999 | user1 | 38 | 0 | +-----+-------+-----+-----+ 1 row in set (0.00 sec) (dg2)root@127.0.0.1 [mytest]> update table_key set name=‘user2‘ where age=38; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 (dg2)root@127.0.0.1 [mytest]> select * from table_key where age=38; +-----+-------+-----+-----+ | id | name | age | sex | +-----+-------+-----+-----+ | 999 | user2 | 38 | 0 | +-----+-------+-----+-----+ 1 row in set (0.00 sec) (dg2)root@127.0.0.1 [mytest]> select * from table_key where age=38; +-----+-------+-----+-----+ | id | name | age | sex | +-----+-------+-----+-----+ | 999 | user3 | 38 | 0 | +-----+-------+-----+-----+ 1 row in set (0.00 sec) (dg2)root@127.0.0.1 [mytest]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.80.101 Master_User: repl Master_Port: 3307 Connect_Retry: 60 Master_Log_File: dg1.000001 Read_Master_Log_Pos: 3952 Relay_Log_File: mysql3307-relay-bin.000002 Relay_Log_Pos: 3967 Relay_Master_Log_File: dg1.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 3952 Relay_Log_Space: 4144 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 12 Master_UUID: fbc1bdf1-829b-11e4-9bdf-000c29b24882 Master_Info_File: /data/3307/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 1 row in set (0.00 sec) (dg2)root@127.0.0.1 [mytest]>
总结：
1、SQL线程应用中继日志，在binlog_format是row格式的时候，确实是根据主键更新（Innodb表，如果没有显示指定主键，如果没有显式定义主键，则InnoDB会选择第一个不包含有NULL值的唯一索引作为主键索引），所以这张图是binlog_format=ROW格式是正确的。
2、使用自增列(INT/BIGINT类型)做主键，这样数据分布基本是有序的与B+数叶子节点分裂顺序一致，性能相对比较好；
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原文地址：http://www.cnblogs.com/LMySQL/p/4514554.html
