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在MySQL数据目录上运行服务器的注意事项

Jun 07, 2016 pm 02:51 PM
mysql data server Precautions Table of contents run

在MySQL数据目录上运行服务器时,都要注意哪些方面呢?下面就为您介绍一些MySQL数据目录运行服务器时需要注意的问题,供您参考。 在MySQL数据目录下的一切由一个单独的实体-MySQL服务器mysqld管理,客户程序绝不直接操作数据。相反,服务器提供数据可访问的

  在MySQL数据目录上运行服务器时,都要注意哪些方面呢?下面就为您介绍一些MySQL数据目录运行服务器时需要注意的问题,供您参考。

  在MySQL数据目录下的一切由一个单独的实体-MySQL服务器mysqld管理,客户程序绝不直接操作数据。相反,服务器提供数据可访问的切入点,它是客户程序与它们想使用的数据之间的中介。

  当服务器启动时,如果有需要,它打开日志文件,然后通过监听网络连接位数据目录呈现一个网络接口。要访问数据,客户程序建立对服务器的一个连接,然后以MySQL查询传输请求来执行希望的操作。服务器执行每一个操作并将结果发回用户。服务器是多线程的并能服务多个同时的客户连接。然而,因为修改操作一个执行一个,实际效果是顺序化请求,以使两个客户决不能在同一时刻改变同一记录。

  在正常的情况下,让服务器作为数据库访问的唯一仲裁者提供了避免可从同时访问数据库表的多个进程的破坏的保证。管理员应该知道有时服务器没有对数据目录的独裁控制。

  当你在一个单个MySQL数据目录上运行多个服务器。一般倪云新一个服务器管理主机上的所有数据库,但是有可能运行多个服务器。如果这完成提供对多个独立数据目录的访问,没有相互影响的问题,但也能启动多个服务器并指向同一个目录。一般地,这不是一个好主意。如果你试图这样,最好是你的系统提供良好的文件锁定功能,否则服务器将不能正确协作。如果你将多个服务器同时写入日志文件,你也冒着你的日志文件称为混乱的根源的风险。

  在你运行isamchk和myisamchk时。isamchk和myisamchk实用程序用于表的维护、诊错和修复,就想你想的那样,因为这些程序可以修改表内容,允许它们与服务器正在操作的同时对表操作,这样能导致表损坏。理解如何限制这种相互影响是很重要的,这样你不会损坏你的表。

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