从豆瓣宕机看IDC单点问题

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[不指定 2008-10-31 17:26 | by 张宴 ]
  豆瓣从上午11点开始宕机(见:http://blog.douban.com/douban/2008/10/31/139/),到现在已经超过6个小时了。

  豆瓣的服务器托管在京东某BGP机房,我在那个机房有机器,试了试,从IDC内部是能访问的。另外,和豆瓣同一IP段的http://59.151.41.22/从外部是能够访问的。所以,我估计是IDC机房内豆瓣那一组线路的问题。

  看来,多IDC异地容灾还是很重要的。IDC不出问题则以,一出问题,就成了最大的单点。

  IDC机房内部到豆瓣路由是通的:
[root@localhost ~]# traceroute www.douban.com
traceroute to www.douban.com (59.151.41.93), 30 hops max, 38 byte packets
1  59.151.xxx.xxx (59.151.xxx.xxx)  0.929 ms  0.917 ms  0.954 ms
2  59.151.96.65 (59.151.96.65)  0.534 ms  0.249 ms  0.263 ms
3  211.151.227.86 (211.151.227.86)  1.931 ms  1.100 ms  2.053 ms
4  59.151.41.93 (59.151.41.93)  0.259 ms  0.252 ms  0.265 ms


  从IDC机房内部是能访问豆瓣的:
[root@localhost ~]# wget http://www.douban.com/
--16:12:15--  http://www.douban.com/
          => `index.html'
Resolving www.douban.com... 59.151.41.93
Connecting to www.douban.com|59.151.41.93|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 17,074 (17K) [text/html]

100%[=========================>] 17,074        --.--K/s            

16:12:15 (12.21 MB/s) - `index.html' saved [17074/17074]







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