欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  数据库

使用mysqlbinlog提取二进制日志_MySQL

程序员文章站 2022-05-06 12:17:00
...
MySQL binlog日志记录了MySQL数据库从启用日志以来所有对当前数据库的变更。binlog日志属于二进制文件,我们可以从binlog提取出来生成可阅读的SQL语句来重建当前数据库以及根据需要实现时点恢复或不完全恢复。本文主要描述了如果提取binlog日志,并给出相关示例。

有关binlog的介绍与描述请参考:MySQL 二进制日志(Binary Log)

1、提取mysqlbinlog的几种方式

2、演示show binlog events方式

mysql> show variables like 'version';
+---------------+------------+
| Variable_name | Value      |
+---------------+------------+
| version       | 5.6.12-log |
+---------------+------------+

mysql> show binary logs;
+-----------------+-----------+
| Log_name        | File_size |
+-----------------+-----------+
| APP01bin.000001 |       120 |
+-----------------+-----------+

a、只查看第一个binlog文件的内容(show binlog events) 
mysql> use replication;
Database changed
mysql> select * from tb;
+------+-------+
| id   | val   |
+------+-------+
|    1 | robin |
+------+-------+

mysql> insert into tb values(2,'jack');
Query OK, 1 row affected (0.02 sec)

mysql> flush logs;
Query OK, 0 rows affected (0.00 sec)

mysql> insert into tb values(3,'fred');
Query OK, 1 row affected (0.00 sec)

mysql> show binary logs;
+-----------------+-----------+
| Log_name        | File_size |
+-----------------+-----------+
| APP01bin.000001 |       409 |
| APP01bin.000002 |       363 |
+-----------------+-----------+

mysql> show binlog events;
+-----------------+-----+-------------+-----------+-------------+----------------------------------------------------+
| Log_name        | Pos | Event_type  | Server_id | End_log_pos | Info                                               |
+-----------------+-----+-------------+-----------+-------------+----------------------------------------------------+
| APP01bin.000001 |   4 | Format_desc |        11 |         120 | Server ver: 5.6.12-log, Binlog ver: 4              |
| APP01bin.000001 | 120 | Query       |        11 |         213 | BEGIN                                              |
| APP01bin.000001 | 213 | Query       |        11 |         332 | use `replication`; insert into tb values(2,'jack') |
| APP01bin.000001 | 332 | Xid         |        11 |         363 | COMMIT /* xid=382 */                               |
| APP01bin.000001 | 363 | Rotate      |        11 |         409 | APP01bin.000002;pos=4                              |
+-----------------+-----+-------------+-----------+-------------+----------------------------------------------------+
-- 在上面的结果中第3行可以看到我们执行的SQL语句,第4行为自动提交
-- Author : Leshami
-- Blog   : http://blog.csdn.net/leshami

b、查看指定binlog文件的内容(show binlog events in 'binname.xxxxx')
mysql> show binlog events in 'APP01bin.000002';
+-----------------+-----+-------------+-----------+-------------+----------------------------------------------------+
| Log_name        | Pos | Event_type  | Server_id | End_log_pos | Info                                               |
+-----------------+-----+-------------+-----------+-------------+----------------------------------------------------+
| APP01bin.000002 |   4 | Format_desc |        11 |         120 | Server ver: 5.6.12-log, Binlog ver: 4              |
| APP01bin.000002 | 120 | Query       |        11 |         213 | BEGIN                                              |
| APP01bin.000002 | 213 | Query       |        11 |         332 | use `replication`; insert into tb values(3,'fred') |
| APP01bin.000002 | 332 | Xid         |        11 |         363 | COMMIT /* xid=394 */                               |
+-----------------+-----+-------------+-----------+-------------+----------------------------------------------------+

c、查看当前正在写入的binlog文件(show master status\G) 
mysql> show master status\G
*************************** 1. row ***************************
             File: APP01bin.000002
         Position: 363
     Binlog_Do_DB: 
 Binlog_Ignore_DB: 
Executed_Gtid_Set: 
1 row in set (0.00 sec)

d、获取指定位置binlog的内容(show binlog events from) 
mysql> show binlog events from 213;
+-----------------+-----+------------+-----------+-------------+----------------------------------------------------+
| Log_name        | Pos | Event_type | Server_id | End_log_pos | Info                                               |
+-----------------+-----+------------+-----------+-------------+----------------------------------------------------+
| APP01bin.000001 | 213 | Query      |        11 |         332 | use `replication`; insert into tb values(2,'jack') |
| APP01bin.000001 | 332 | Xid        |        11 |         363 | COMMIT /* xid=382 */                               |
| APP01bin.000001 | 363 | Rotate     |        11 |         409 | APP01bin.000002;pos=4                              |
+-----------------+-----+------------+-----------+-------------+----------------------------------------------------+

3、演示mysqlbinlog方式提取binlog

a、提取指定的binlog日志
# mysqlbinlog /opt/data/APP01bin.000001
# mysqlbinlog /opt/data/APP01bin.000001|grep insert
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
insert into tb values(2,'jack')

b、提取指定position位置的binlog日志
# mysqlbinlog --start-position="120" --stop-position="332" /opt/data/APP01bin.000001

c、提取指定position位置的binlog日志并输出到压缩文件
# mysqlbinlog --start-position="120" --stop-position="332" /opt/data/APP01bin.000001 |gzip >extra_01.sql.gz

d、提取指定position位置的binlog日志导入数据库
# mysqlbinlog --start-position="120" --stop-position="332" /opt/data/APP01bin.000001 | mysql -uroot -p

e、提取指定开始时间的binlog并输出到日志文件
# mysqlbinlog --start-datetime="2014-12-15 20:15:23" /opt/data/APP01bin.000002 --result-file=extra02.sql

f、提取指定位置的多个binlog日志文件
# mysqlbinlog --start-position="120" --stop-position="332" /opt/data/APP01bin.000001 /opt/data/APP01bin.000002|more

g、提取指定数据库binlog并转换字符集到UTF8
# mysqlbinlog --database=test --set-charset=utf8 /opt/data/APP01bin.000001 /opt/data/APP01bin.000002 >test.sql

h、远程提取日志,指定结束时间 
# mysqlbinlog -urobin -p -h192.168.1.116 -P3306 --stop-datetime="2014-12-15 20:30:23" --read-from-remote-server mysql-bin.000033 |more

i、远程提取使用row格式的binlog日志并输出到本地文件
# mysqlbinlog -urobin -p -P3606 -h192.168.1.177 --read-from-remote-server -vv inst3606bin.000005 >row.sql

4、获取mysqlbinlog的帮助信息(仅列出常用选项)

-d, --database=name

-f, --force-read

-h, --host=name

-l, --local-load=name

-p, --password[=name]

-P, --port=#

--protocol=name

-R, --read-from-remote-server|--read-from-remote-master=name

-r, --result-file=name

-s, --short-form

-S, --socket=name

--start-datetime=name

--stop-datetime=name

-j, --start-position=#

--server-id=#

--set-charset=name

-D, --disable-log-bin

-u, --user=name

-v, --verbose

-V, --version

相关标签: 二进制 日志