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This may be a slightly naive question, but why list both "500 web servers" and "8 nginx"? Seeing as nginx IS a webserver, is it fulfilling a different function

This may be a slightly naive question, but why list both "500 web servers" and "8 nginx"? Seeing as nginx IS a webserver, is it fulfilling a different function (serving static pages?) compared with the Apache servers?

riledhel 15y ago
Maybe the nginx servers are configured to serve static content, as reverse proxies or load balancers.
huxley 15y ago
Nginx can also act a proxy for mail protocols: http://wiki.nginx.org/MailCoreModule http://wiki.nginx.org/MailCoreModule
simonw 15y ago
$ curl -i 'http://www.tumblr.com/ http://www.tumblr.com/ HTTP/1.1 302 Found Date: Mon, 13 Feb 2012 19:31:35 GMT Server: Apache P3P: CP="ALL ADM DEV PSAi COM OUR OTRo STP IND ONL" Location: https://www.tumblr.com/ https://www.tumblr.com/ Vary: Accept-Encoding X-Tumblr-Usec: D=15547 Content-Length: 0 Connection: close Content-Type: text/html; charset=UTF-8 $ curl -i 'http://assets.tumblr.com/images/favicon.gif?2 http://assets.tumblr.com/images/favicon.gif?2 HTTP/1.1 200 OK Server: nginx/0.8.53 Content-Type: image/gif Last-Modified: Fri, 15 Apr 2011 22:13:30 GMT Accept-Ranges: bytes Content-Length: 635 X-Varnish: 1795992965 Cache-Control: max-age=2196224 Expires: Sat, 10 Mar 2012 05:35:30 GMT Date: Mon, 13 Feb 2012 19:31:46 GMT Connection: keep-alive So it looks like their application is being served by Apache (and PHP), while their static assets are served by nginx behind Varnish.
- retroafroman 15y ago
  Good catch, that's along the lines I was thinking
- silverlight 15y ago
  Well, their assets are begin served from a CDN. Are they counting that in their server count? $ host assets.tumblr.com assets.tumblr.com is an alias for assets.tumblr.com.edgesuite.net. assets.tumblr.com.edgesuite.net is an alias for a1092.g.akamai.net. a1092.g.akamai.net has address 69.31.106.32 a1092.g.akamai.net has address 69.31.106.50

riledhel 15y ago

Maybe the nginx servers are configured to serve static content, as reverse proxies or load balancers.

huxley 15y ago

Nginx can also act a proxy for mail protocols: http://wiki.nginx.org/MailCoreModule http://wiki.nginx.org/MailCoreModule

simonw 15y ago

$ curl -i 'http://www.tumblr.com/ http://www.tumblr.com/ HTTP/1.1 302 Found Date: Mon, 13 Feb 2012 19:31:35 GMT Server: Apache P3P: CP="ALL ADM DEV PSAi COM OUR OTRo STP IND ONL" Location: https://www.tumblr.com/ https://www.tumblr.com/ Vary: Accept-Encoding X-Tumblr-Usec: D=15547 Content-Length: 0 Connection: close Content-Type: text/html; charset=UTF-8 $ curl -i 'http://assets.tumblr.com/images/favicon.gif?2 http://assets.tumblr.com/images/favicon.gif?2 HTTP/1.1 200 OK Server: nginx/0.8.53 Content-Type: image/gif Last-Modified: Fri, 15 Apr 2011 22:13:30 GMT Accept-Ranges: bytes Content-Length: 635 X-Varnish: 1795992965 Cache-Control: max-age=2196224 Expires: Sat, 10 Mar 2012 05:35:30 GMT Date: Mon, 13 Feb 2012 19:31:46 GMT Connection: keep-alive So it looks like their application is being served by Apache (and PHP), while their static assets are served by nginx behind Varnish.

retroafroman 15y ago
Good catch, that's along the lines I was thinking
silverlight 15y ago
Well, their assets are begin served from a CDN. Are they counting that in their server count? $ host assets.tumblr.com assets.tumblr.com is an alias for assets.tumblr.com.edgesuite.net. assets.tumblr.com.edgesuite.net is an alias for a1092.g.akamai.net. a1092.g.akamai.net has address 69.31.106.32 a1092.g.akamai.net has address 69.31.106.50