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I see StackOverflow has the following HTTP response header: Server: nginx/0.7.62.

Why? Doesn't it suppose to have IIS kind of server?


I see that meta have a different header: Server: Microsoft-IIS/7.5.

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Because they admit that anything is better then a Microsoft product. –  Josh K May 16 '10 at 5:20
I jest! I jest! –  Josh K May 16 '10 at 5:20
Random question for the team or Jeff: How many production servers do you have right now? –  uɐɯsO uɐɥʇɐN May 16 '10 at 6:38
How about memcached[1]? [1] memcached.org –  fwaechter Aug 9 '10 at 8:56

3 Answers 3

up vote 3 down vote accepted

In January this year, Jeff posted the network diagram for Stack Overflow (more information here and here)

I'm guessing its from the proxy server, but it could also be static content.

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My guess is that nginx acts as a load balancer and caching server that is between you and the real IIS webservers.

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Hi stacker - we're currently evaluating nginx as a front-end reverse proxy that may give us a little more control over things than we currently have.

I'm sure that there will be blog posts down the road telling of our adventures with nginx... stay tuned!

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When you say "we"... new hire at stackexchange? –  Joel Coehoorn May 18 '10 at 18:08
Yup. I'm helping out with the sysadmin related work. –  Michael Gorsuch May 18 '10 at 21:57
Is nginx still in play and if so, what are you guys using it for? –  Matthew Krieger Jan 28 '11 at 19:00

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