运维之道 | mysql-binlog日志说明、备份、恢复数据

mysql-binlog日志说明、备份、恢复数据

一、开启binlog日志功能

[root@localhost ~]# vim /etc/my.cnf
#`在[mysqld] 区块添加` 
log-bin=mysql-bin  #确认是打开状态(mysql-bin 是日志的基本名或前缀名)
#binlog-ignore-db=mysql #忽略数据库(被忽略的数据库中,二进制文件中是无记录的!)

• 注意：每次服务器（数据库）重启，服务器会调用flush logs;，新创建一个binlog日志！

1.查看所有二进制日志文件

mysql> show binary logs;
+------------------+-----------+
| Log_name         | File_size |
+------------------+-----------+
| mysql-bin.000001 |       120 |
+------------------+-----------+
1 row in set (0.00 sec)

2.查看mysql某个日志的事件

mysql> show binlog events  in 'mysql-bin.000001';
+------------------+-----+-------------+-----------+-------------+---------------------------------------+
| Log_name         | Pos | Event_type  | Server_id | End_log_pos | Info                                  |
+------------------+-----+-------------+-----------+-------------+---------------------------------------+
| mysql-bin.000001 |   4 | Format_desc |       128 |         120 | Server ver: 5.6.43-log, Binlog ver: 4 |
+------------------+-----+-------------+-----------+-------------+---------------------------------------+
1 row in set (0.00 sec)

3.查看binlog日志是否开启

mysql> show variables like 'log_%';
+----------------------------------------+-----------------------------+
| Variable_name                          | Value                       |
+----------------------------------------+-----------------------------+
| log_bin                                | ON                          |
| log_bin_basename                       | /data/mysql/mysql-bin       |
| log_bin_index                          | /data/mysql/mysql-bin.index |
| log_bin_trust_function_creators        | OFF                         |
| log_bin_use_v1_row_events              | OFF                         |
| log_error                              | ./localhost.localdomain.err |
.........
+----------------------------------------+-----------------------------+
13 rows in set (0.00 sec)

---

二、常用的binlog日志操作命令

1.查看所有binlog日志列表

mysql> show master logs;
+------------------+-----------+
| Log_name         | File_size |
+------------------+-----------+
| mysql-bin.000001 |       120 |
+------------------+-----------+
1 row in set (0.00 sec)

2.查看最新master状态

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------