. . 在MySQL的配置文件中，設定default-table-type=InnoDB，發現MySQL無法正常的啟動，錯誤日志中給出了如下的信息：
150210 18:11:19 mysqld_safe mysqld from pid file /data/mysqldata/mysql.pid ended
150210 18:15:20 mysqld_safe Starting mysqld daemon with databases from /data/mysqldata
150210 18:15:20 InnoDB: The InnoDB memory heap is disabled
150210 18:15:20 InnoDB: Mutexes and rw_locks use GCC atomic builtins
150210 18:15:20 InnoDB: Compressed tables use zlib 1.2.3
150210 18:15:20 InnoDB: Initializing buffer pool, size = 128.0M
150210 18:15:20 InnoDB: Completed initialization of buffer pool
150210 18:15:20 InnoDB: highest supported file format is Barracuda.
InnoDB: No valid checkpoint found.
InnoDB: If this error appears when you are creating an InnoDB database,
InnoDB: the problem may be that during an earlier attempt you managed
InnoDB: to create the InnoDB data files, but log file creation failed.
InnoDB: If that is the case, please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.5/en/error-creating-innodb.html
150210 18:15:20 [ERROR] Plugin 'InnoDB' init function returned error.
150210 18:15:20 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
150210 18:15:20 [ERROR] Unknown/unsupported storage engine: InnoDB
150210 18:15:20 [ERROR] Aborting
在網上查找后，只要刪除MySQL目錄下的ib_logfile0和ib_logfile1和ibdata1就可以了，只刪除前兩個還是不行，得都刪除才可以，我測試的時候是這樣