MySQL binlog日志記錄了MySQL數據庫從啟用日志以來所有對當前數據庫的變更。binlog日志屬于二進制文件，我們可以從binlog提取出來生成可閱讀的SQL語句來重建當前數據庫以及根據需要實現時點恢復或不完全恢復。本文主要描述了如果提取binlog日志，并給出相關示例。

有關binlog的介紹與描述請參考：MySQL 二進制日志(Binary Log)

1、提取mysqlbinlog的幾種方式

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、只查看第一個binlog文件的內容(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 |

+-----------------+-----+-------------+-----------+-------------+----------------------------------------------------+

-- 在上面的結果中第3行可以看到我們執行的SQL語句，第4行為自動提交

-- Author : Leshami

-- Blog : http://blog.csdn.net/leshami

b、查看指定binlog文件的內容(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、查看當前正在寫入的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、獲取指定位置binlog的內容(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日志并輸出到壓縮文件

# 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日志導入數據庫

# mysqlbinlog --start-position="120" --stop-position="332" /opt/data/APP01bin.000001 | mysql -uroot -p

e、提取指定開始時間的binlog并輸出到日志文件

# mysqlbinlog --start-datetime="2014-12-15 20:15:23" /opt/data/APP01bin.000002 --result-file=extra02.sql

f、提取指定位置的多個binlog日志文件

# mysqlbinlog --start-position="120" --stop-position="332" /opt/data/APP01bin.000001 /opt/data/APP01bin.000002|more

g、提取指定數據庫binlog并轉換字符集到UTF8

# mysqlbinlog --database=test --set-charset=utf8 /opt/data/APP01bin.000001 /opt/data/APP01bin.000002 >test.sql

h、遠程提取日志，指定結束時間

# 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、遠程提取使用row格式的binlog日志并輸出到本地文件

# mysqlbinlog -urobin -p -P3606 -h192.168.1.177 --read-from-remote-server -vv inst3606bin.000005 >row.sql

4、獲取mysqlbinlog的幫助信息(僅列出常用選項)

-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

總結

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