解決centos伺服器異常斷電mysql啟動異常啟動Mysql時報錯：mysqld

解決centos伺服器異常斷電mysql啟動異常啟動Mysql時報錯：mysqld

現象：
centos伺服器異常斷電MySQL啟動異常啟動Mysql時報錯：mysqld_safe mysqld from pid file /usr/local/mysql/Linux.pid end
但是開啟記錄檔 查看

InnoDB: Completed initialization of buffer pool
InnoDB: Error: log file ./ib_logfile0 is of different size 50331648 bytes
InnoDB: than specified in the .cnf file 5242880 bytes!
160603
[ERROR] Plugin ‘InnoDB’ init function returned error.
160603
14:06:15 [ERROR] Plugin ‘InnoDB’ registration as a STORAGE ENGINE failed.
160603
14:06:15 [ERROR] Unknown/unsupported storage engine: InnoDB
160603 14:06:15 [ERROR] Aborting

處理方案：

1、儲存引擎錯誤
Unknown/unsupported storage engine: InnoDB
2、檢查一下設定檔中關於innodb的參數，如果有skip-innodb注釋掉
3、如果重新設定了innodb_log_file_size之類的，
4、需要刪除幾個rm -rf ib_logfile，然後重啟資料庫