一、简介

MyFlash是由美团点评公司技术工程部开发维护的一个回滚DML操作的工具。该工具通过解析v4版本的binlog，完成回滚操作。相对已有的回滚工具，其增加了更多的过滤选项，让回滚更加容易。该工具已经在美团点评内部使用

二、限制

binlog格式必须为row,且binlog_row_image=full
仅支持5.6与5.7
只能回滚DML（增、删、改）

三、安装测试

3.1 安装

下载：
git clone https://github.com/Meituan-Dianping/MyFlash.git
cd MyFlash/

编译：
1）动态编译
gcc -w  `pkg-config --cflags --libs glib-2.0` source/binlogParseGlib.c  -o binary/flashback
2）静态编译
gcc -w -g `pkg-config --cflags  glib-2.0` source/binlogParseGlib.c   -o binary/flashback /usr/lib64/libglib-2.0.a -lrt
为了保证在一台机器上编译后，可以在其它机器上使用，需要满足以下两个条件 a) 将glib做成静态链接 b）在编译的那台机器的glibc版本（查看方法为ldd --version）要小于等于要运行该软件的那台机器glibc版本 因此需要你在一台glibc版本较低的机器上运行如下命令即可。

使用：
[root@offline02 MyFlash]# cd binary/
[root@offline02 binary]# ls
flashback  mysqlbinlog20160408
[root@offline02 binary]# ./flashback --help
Usage:
  flashback [OPTION...]

Help Options:
  -h, --help                  Show help options

Application Options:
  --databaseNames             databaseName to apply. if multiple, seperate by comma(,)
  --tableNames                tableName to apply. if multiple, seperate by comma(,)
  --start-position            start position
  --stop-position             stop position
  --start-datetime            start time (format %Y-%m-%d %H:%M:%S)
  --stop-datetime             stop time (format %Y-%m-%d %H:%M:%S)
  --sqlTypes                  sql type to filter . support INSERT, UPDATE ,DELETE. if multiple, seperate by comma(,)
  --maxSplitSize              max file size after split, the uint is M
  --binlogFileNames           binlog files to process. if multiple, seperate by comma(,)
  --outBinlogFileNameBase     output binlog file name base
  --logLevel                  log level, available option is debug,warning,error
  --include-gtids             gtids to process
  --exclude-gtids             gtids to skip

3.2 用法

1）回滚整个文件

./flashback --binlogFileNames=haha.000041
mysqlbinlog binlog_output_base.flashback | mysql -h<host> -u<user> -p

2）回滚该文件中的所有insert语句

./flashback  --sqlTypes='INSERT' --binlogFileNames=haha.000041
mysqlbinlog binlog_output_base.flashback | mysql -h<host> -u<user> -p

3）回滚大文件

回滚
./flashback --binlogFileNames=haha.000042
切割大文件
./flashback --maxSplitSize=1 --binlogFileNames=binlog_output_base.flashback
应用
mysqlbinlog binlog_output_base.flashback.000001 | mysql -h<host> -u<user> -p
...
mysqlbinlog binlog_output_base.flashback.<N> | mysql -h<host> -u<user> -p

3.3 测试

创建表结构

CREATE TABLE `testFlashback2` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `nameShort` varchar(20) DEFAULT NULL,
  `nameLong` varchar(260) DEFAULT NULL,
  `amount` decimal(19,9) DEFAULT NULL,
  `amountFloat` float DEFAULT NULL,
  `amountDouble` double DEFAULT NULL,
  `createDatetime6` datetime(6) DEFAULT NULL,
  `createDatetime` datetime DEFAULT NULL,
  `createTimestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `nameText` text,
  `nameBlob` blob,
  `nameMedium` mediumtext,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB

3.3.1 插入回滚

flush logs
insert into testFlashback2(nameShort,nameLong,amount,amountFloat,amountDouble,createDatetime6,createDatetime,createTimestamp,nameText,nameBlob,nameMedium) values('aaa','bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb',10.5,10.6,10.7,'2017-10-26 10:00:00','2017-10-26 10:00:00','2017-10-26 10:00:00','cccc','dddd','eee');
insert into testFlashback2(nameShort,nameLong,amount,amountFloat,amountDouble,createDatetime6,createDatetime,createTimestamp,nameText,nameBlob,nameMedium) values('aaa','bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb',10.5,10.6,10.7,'2017-10-26 10:00:00','2017-10-26 10:00:00','2017-10-26 10:00:00','cccc','dddd','eee');
flush logs;
./binary/flashback --binlogFileNames=/var/lib/mysql/haha.000048
  在当前运行目录下产生binlog_output_base.flashback文件
mysqlbinlog --skip-gtids  binlog_output_base.flashback | mysql --socket=/var/lib/mysql/mysql.sock test
  执行结果
mysql> select * from testFlashback2;
Empty set (0.00 sec)

3.3.2 删除回滚

delete from testFlashback2;
insert into testFlashback2(nameShort,nameLong,amount,amountFloat,amountDouble,createDatetime6,createDatetime,createTimestamp,nameText,nameBlob,nameMedium) values('aaa','bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb',10.5,10.6,10.7,'2017-10-26 10:00:00','2017-10-26 10:00:00','2017-10-26 10:00:00','cccc','dddd','eee');
flush logs;
delete from testFlashback2;
./binary/flashback --binlogFileNames=/var/lib/mysql/haha.000050
  在当前运行目录下产生binlog_output_base.flashback文件
mysqlbinlog --skip-gtids  binlog_output_base.flashback | mysql --socket=/var/lib/mysql/mysql.sock test
  执行结果
+----+-----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------+-------------+--------------+----------------------------+---------------------+---------------------+----------+----------+------------+
| id | nameShort | nameLong                                                                                                                                                                                                      | amount       | amountFloat | amountDouble | createDatetime6            | createDatetime      | createTimestamp     | nameText | nameBlob | nameMedium |
+----+-----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------+-------------+--------------+----------------------------+---------------------+---------------------+----------+----------+------------+
|  4 | aaa       | bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb | 10.500000000 |        10.6 |         10.7 | 2017-10-26 10:00:00.000000 | 2017-10-26 10:00:00 | 2017-10-26 10:00:00 | cccc     | dddd     | eee        |
+----+-----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------+-------------+--------------+----------------------------+---------------------+---------------------+----------+----------+------------+

3.3.3 更新回滚

delete from testFlashback2;
insert into testFlashback2(nameShort,nameLong,amount,amountFloat,amountDouble,createDatetime6,createDatetime,createTimestamp,nameText,nameBlob,nameMedium) values('aaa','bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb',10.111,10.6,10.7,'2017-10-26 10:00:00','2017-10-26 10:00:00','2017-10-26 10:00:00','cccc','dddd','eee');
flush logs;
mysql> checksum table testFlashback2;
+---------------------+-----------+
| Table               | Checksum  |
+---------------------+-----------+
| test.testFlashback2 | 717087411 |
+---------------------+-----------+
update testFlashback2 set amount=10.222;
mysql> checksum table testFlashback2;
+---------------------+------------+
| Table               | Checksum   |
+---------------------+------------+
| test.testFlashback2 | 3797190846 |
+---------------------+------------+
./binary/flashback --binlogFileNames=/var/lib/mysql/haha.000052
mysqlbinlog --skip-gtids  binlog_output_base.flashback | mysql --socket=/var/lib/mysql/mysql.sock test
mysql> checksum table testFlashback2;
+---------------------+-----------+
| Table               | Checksum  |
+---------------------+-----------+
| test.testFlashback2 | 717087411 |
+---------------------+-----------+

参考：

https://github.com/Meituan-Dianping/MyFlash

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美团闪回工具MyFlash

一、简介

二、限制

三、安装测试

3.1 安装

3.2 用法

3.3 测试

3.3.1 插入回滚

3.3.2 删除回滚

3.3.3 更新回滚

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