ubuntu trusty上的MariaDB 10.1.13：不可能有其他datadir

在Ubuntu Trusty服务器64位上：

我让MariaDB 10.1与另一个datadir一起工作

datadir=/mnt/SRVDATA/var/lib/mysql

昨天我收到了10.1.13-MariaDB-1~ trusty的更新

deb http://mirror.netcologne.de/mariadb/repo/10.1/ubuntu trusty main

MariaDB不会再开始了

我重命名了/etc/mysql、/usr/lib/mysql和/var/lib/mysql，并重新安装了MariaDB服务器和客户端。 我重新配置了dpkg，在/var/lib/mysql中得到了一个新的原始数据库。 有了它我就可以开始了

我使用所有权限再次将/var/lib/mysql复制到/mnt/SRVDATA/var/lib/mysql，我将my.cnf更改为将datadir指向/mnt/SRVDATA/var/lib/mysql，但MariaDB不会启动

Apparmor已关闭，其配置文件已拆除

系统日志中的错误：

Mar 30 09:58:47 hg-bioinfo mysqld: 
Mar 30 09:58:47 hg-bioinfo mysqld_safe: mysqld from pid file /var/run/mysqld/mysqld.pid ended
Mar 30 10:08:04 hg-bioinfo mysqld_safe: Starting mysqld daemon with databases from /mnt/SRVDATA/var/lib/mysql
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] /usr/sbin/mysqld (mysqld 10.1.13-MariaDB-1~trusty) starting as process 30831 ...
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: Using mutexes to ref count buffer pool pages
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: The InnoDB memory heap is disabled
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: Memory barrier is not used
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: Compressed tables use zlib 1.2.8
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: Using Linux native AIO
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: Using SSE crc32 instructions
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: Initializing buffer pool, size = 256.0M
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: Completed initialization of buffer pool
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [Note] InnoDB: Highest supported file format is Barracuda.
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [ERROR] InnoDB: Tried to read 512 bytes at offset 512. Was only able to read 0.
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 7fe86f43d7c0  InnoDB: Operating system error number 22 in a file operation.
Mar 30 10:08:04 hg-bioinfo mysqld: InnoDB: Error number 22 means 'Invalid argument'.
Mar 30 10:08:04 hg-bioinfo mysqld: InnoDB: Some operating system error numbers are described at
Mar 30 10:08:04 hg-bioinfo mysqld: InnoDB: http://dev.mysql.com/doc/refman/5.6/en/operating-system-error-codes.html
Mar 30 10:08:04 hg-bioinfo mysqld:  InnoDB: Operation read to file /home/buildbot/buildbot/build/mariadb-10.1.13/storage/xtradb/os/os0file.cc and at line 3158
Mar 30 10:08:04 hg-bioinfo mysqld: 2016-03-30 10:08:04 140636275857344 [ERROR] InnoDB: File (unknown): 'read' returned OS error 222. Cannot continue operation
Mar 30 10:08:04 hg-bioinfo mysqld_safe: mysqld from pid file /var/run/mysqld/mysqld.pid ended
Mar 30 10:09:05 hg-bioinfo /etc/init.d/mysql[31401]: 0 processes alive and '/usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf ping' resulted in
Mar 30 10:09:05 hg-bioinfo /etc/init.d/mysql[31401]: #007/usr/bin/mysqladmin: connect to server at 'localhost' failed
Mar 30 10:09:05 hg-bioinfo /etc/init.d/mysql[31401]: error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2 "No such file or directory")'
Mar 30 10:09:05 hg-bioinfo /etc/init.d/mysql[31401]: Check that mysqld is running and that the socket: '/var/run/mysqld/mysqld.sock' exists!

非常感谢您的提示

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致以最诚挚的问候

在与Montywi在#maria的FreeNode上进行了一次精彩的聊天后，发现这是10.1.13版中引入的一个新bug

它涉及到以下配置：

innodb_flush_method=O_DIRECT

与块大小为512的文件系统上的datadir结合使用（我的是RAID）

目前的解决办法是：

innodb_flush_method=O_DSYNC

这个错误现在已经修复，很快将在10.1.14版中发布，所以Montywi

谢谢大家