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mysqlbinlog把mysql二进制文件转换文本文件
mysqlbinlog命令是mysql中的一个恢复mysql数据库的工具了,下面本文章再次来为各位介绍利用mysqlbinlog来恢复mysql二进制日志的例子.
目前一些项目已经迁移到Mysql5.5,而在mysql5.5中binlog_format为mixed这样的话,默认情况下的Mysql binary log就是base64格式,不可读,为了在排查问题时候,提供帮助研读下mysqlbinlog的帮助文档得知可以解码:
- –base64-output[=name]
- Determine when the output statements should be
- base64-encoded BINLOG statements: ’never’ disables it and
- works only for binlogs without row-based events;
- ’decode-rows’ decodes row events into commented SQL
- statements if the –verbose option is also given; ’auto’
- prints base64 only when necessary (i.e., for row-based
- events and format description events); ’always’ prints
- base64 whenever possible. ’always’ is deprecated, will be
- removed in a future version, and should not be used in a
- production system. –base64-output with no ’name’
- //开源代码www.xiariboke.net
- argument is equivalent to –base64-output=always and is
- also deprecated. If no –base64-output[=name] option is
- given at all, the default is ’auto’.
- mysqlbinlog –base64-output=DECODE-ROWS -v mysql-bin.00002
通过给定–base64-output和-v参数,可以解码row模式下的binary log.
unknown variable ‘default-character-set=utf8mb4′错误
一个手机网的项目,使用的编码为utf8mb4,一切都是正常的,到了用mysqlbinlog的时候,提示如下:
[root@localhost data]# mysqlbinlog mysql-bin-500.000011
mysqlbinlog:unknown variable ‘default-character-set=utf8mb4′
解决方法:
1. 修改my.cnf，在[client]下注释或删除default-character-set=utf8mb4；
2. 在命令行中加入–no-defaults开关,使用mysqlbinlog –no-defaults；