使用DBRECOVER FOR MYSQL恢复innodb_force_recovery参数无法强制启动的MySQL实例数据

最新推荐文章于 2024-08-12 16:52:09 发布

Maclean

最新推荐文章于 2024-08-12 16:52:09 发布

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分类专栏： MySQL

本文链接：https://blog.youkuaiyun.com/askmaclean/article/details/107908166

当MySQL实例因数据库损坏无法启动时，可以使用DBRECOVER FOR MYSQL进行恢复。本文介绍了如何关闭MySQL实例，启动恢复程序，并在图形化界面中选择数据文件夹，浏览并导出数据，最后通过SQL文件恢复数据。

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针对MySQL数据库无法打开的场景的恢复

此场景下用户尝试启动MySQL实例，但MySQL实例可能因数据库本身损坏而CRASH进程崩溃。

相关报错可能如下：

InnoDB: Waiting for the background threads to start
InnoDB: Error: tablespace size stored in header is 3712 pages, but
InnoDB: the sum of data file sizes is only 3072 pages
InnoDB: Cannot start InnoDB. The tail of the system tablespace is
InnoDB: missing. Have you edited innodb_data_file_path in my.cnf in an
InnoDB: inappropriate way, removing ibdata files from there?
InnoDB: You can set innodb_force_recovery=1 in my.cnf to force
InnoDB: a startup if you are trying to recover a badly corrupt database.


InnoDB: Assertion failure in thread 3876 in file ha_innodb.cc line 17352
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace