从LiveJournal后台发展看大规模网站性能优化方法

于敦德 2006-3-16

一、LiveJournal发展历程

LiveJournal是99年始于校园中的项目,几个人出于爱好做了这样一个应用,以实现以下功能:

  • 博客,论坛
  • 社会性网络,找到朋友
  • 聚合,把朋友的文章聚合在一起

LiveJournal采用了大量的开源软件,甚至它本身也是一个开源软件。

在上线后,LiveJournal实现了非常快速的增长:

  • 2004年4月份:280万注册用户。
  • 2005年4月份:680万注册用户。
  • 2005年8月份:790万注册用户。
  • 达到了每秒钟上千次的页面请求及处理。
  • 使用了大量MySQL服务器。
  • 使用了大量通用组件。

二、LiveJournal架构现状概况

livejournal_backend.png

三、从LiveJournal发展中学习

LiveJournal从1台服务器发展到100台服务器,这其中经历了无数的伤痛,但同时也摸索出了解决这些问题的方法,通过对LiveJournal的学习,可以让我们避免LJ曾经犯过的错误,并且从一开始就对系统进行良好的设计,以避免后期的痛苦。

下面我们一步一步看LJ发展的脚步。

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