【发布时间】：2016-12-08 09:54:20
【问题描述】：
我使用 MySQL 5.7 和 CentOS 7.2。
一开始我在my.cnf中的datadir配置是/var/lib/mysql
现在我想更改数据目录。
我尝试了两种方法：
首先，我将/var/lib/mysql 中的所有文件和目录复制到/home/data，然后运行chown -R mysql:mysql /home/data。但是当我运行systemctl start mysqld 时，我收到错误消息：
2016-12-08T16:33:38.206780Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2016-12-08T16:33:38.206806Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2016-12-08T16:33:38.206817Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2016-12-08T16:33:38.807398Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2016-12-08T16:33:38.807421Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2016-12-08T16:33:38.807429Z 0 [ERROR] Failed to initialize plugins.
2016-12-08T16:33:38.807436Z 0 [ERROR] Aborting
其次，我将 /var/lib/mysql 移动到 /home 并在 /var/lib 目录中运行 ln -s /home/mysql mysql。当我运行systemctl start mysqld 时，我收到错误消息：
2016-12-08T16:48:28.958136Z 0 [ERROR] InnoDB: Operating system error number 13 in a file operation.
2016-12-08T16:48:28.958165Z 0 [ERROR] InnoDB: The error means mysqld does not have the access rights to the directory.
2016-12-08T16:48:28.958174Z 0 [ERROR] InnoDB: os_file_get_status() failed on './ibdata1'. Can't determine file permissions
2016-12-08T16:48:28.958184Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2016-12-08T16:48:29.558751Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2016-12-08T16:48:29.558792Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2016-12-08T16:48:29.558806Z 0 [ERROR] Failed to initialize plugins.
2016-12-08T16:48:29.558817Z 0 [ERROR] Aborting
我该如何处理？
【问题讨论】：
-
我在 Windows 中遇到了这个问题。一旦我删除了日志文件，服务就会正常启动。 ibdata1 将是日志文件，如果你有备份删除它并尝试再次启动服务
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@Rajesh 我曾尝试删除所有
ib_logfile。但它不起作用。非常感谢。 -
@ibear 你能在哪里解决这个问题？
标签： mysql