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2008-10-31 17:26 | by
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：
从IDC机房内部是能访问豆瓣的：
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
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]
--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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2022-8-18 22:51
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