# Mod\_proxy\_balancer question **URL:** \ **Category:** Rails\ **Created:** [August 14, 2008, 9:17pm UTC](https://www.ruby-forum.com/t/mod-proxy-balancer-question/145900 "2008-08-14T21:17:25Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![davidf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/f07891/32.png) [@davidf](https://www.ruby-forum.com/u/davidf)\ **Post date:** [August 14, 2008, 9:17pm UTC](https://www.ruby-forum.com/t/mod-proxy-balancer-question/145900/1 "2008-08-14T21:17:25Z")
Here’s the problem, I want to start running more mongrels on a 2nd server, but I want it so that any file uploads still go to the 1st server. Anyone know how I can do this? ---
**Author:** ![davidf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/f07891/32.png) [@davidf](https://www.ruby-forum.com/u/davidf)\ **Post date:** [August 14, 2008, 9:53pm UTC](https://www.ruby-forum.com/t/mod-proxy-balancer-question/145900/2 "2008-08-14T21:53:02Z")
Hi David, > Here’s the problem, I want to start running more mongrels on a 2nd > server, but I want it so that any file uploads still go to the 1st > server. You’ll need some sort of Layer 7 rules engine to configure that, which mod\_proxy\_balancer doesn’t have. Alternatively you could look into using some sort of shared storage such as NFS, Samba or GFS. – Roderick van Domburg > **[De domeinnaam Nedforce.nl is te koop.](http://www.nedforce.nl)** > > Deze mooie domeinnaam kan al over een paar minuten van jou zijn. Betalen gaat eenvoudig en vertrouwd via iDEAL. Direct na de betaling ontvang je de verhuiscode per e-mail en kun je aan de slag. ---
**Author:** ![davidf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/f07891/32.png) [@davidf](https://www.ruby-forum.com/u/davidf)\ **Post date:** [August 14, 2008, 10:13pm UTC](https://www.ruby-forum.com/t/mod-proxy-balancer-question/145900/3 "2008-08-14T22:13:54Z")
On Aug 14, 8:53 pm, Roderick van Domburg \ wrote: > Hi David, > > > Here’s the problem, I want to start running more mongrels on a 2nd > > server, but I want it so that any file uploads still go to the 1st > > server. > > You’ll need some sort of Layer 7 rules engine to configure that, which > mod\_proxy\_balancer doesn’t have. Alternatively you could look into using > some sort of shared storage such as NFS, Samba or GFS. You can definitely change which mongrels you balance to based on the url. I wouldn’t be surprised if you could rewrite based on the content- type header (and all file uploads will have the multipart etc content type. Fred ---
**Author:** ![davidf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/f07891/32.png) [@davidf](https://www.ruby-forum.com/u/davidf)\ **Post date:** [August 14, 2008, 10:42pm UTC](https://www.ruby-forum.com/t/mod-proxy-balancer-question/145900/4 "2008-08-14T22:42:14Z")
> You can definitely change which mongrels you balance to based on the > url. I wouldn’t be surprised if you could rewrite based on the content- > type header (and all file uploads will have the multipart etc content > type. > > Fred Yeah the URL would be enough, there’s only one action that handles file uploads. Can you give me any pointers on this, what would I need to write in the conf file? ---
**Author:** ![davidf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/f07891/32.png) [@davidf](https://www.ruby-forum.com/u/davidf)\ **Post date:** [August 14, 2008, 11:04pm UTC](https://www.ruby-forum.com/t/mod-proxy-balancer-question/145900/5 "2008-08-14T23:04:54Z")
On Aug 14, 9:42 pm, David F. \ wrote: > > You can definitely change which mongrels you balance to based on the > > url. I wouldn’t be surprised if you could rewrite based on the content- > > type header (and all file uploads will have the multipart etc content > > type. > > > Fred > > Yeah the URL would be enough, there’s only one action that handles file > uploads. Can you give me any pointers on this, what would I need to > write in the conf file? our vhost has got something like RewriteRule ^/admin/._$ balancer://admin\_cluster%{REQUEST\_URI} [P,QSA,L] RewriteRule ^/report/._$ balancer://admin\_cluster%{REQUEST\_URI} [P,QSA,L] # All other URLs should be served by the texpert cluster RewriteRule ^/.\*$ balancer://main\_cluster%{REQUEST\_URI} [P,QSA,L] urls starting with /admin and /report go the the admin\_cluster, and the others to the main\_cluster. Fred ---
**Author:** ![davidf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/f07891/32.png) [@davidf](https://www.ruby-forum.com/u/davidf)\ **Post date:** [August 14, 2008, 11:19pm UTC](https://www.ruby-forum.com/t/mod-proxy-balancer-question/145900/6 "2008-08-14T23:19:59Z")
> our vhost has got something like > > RewriteRule ^/admin/._$ balancer://admin\_cluster%{REQUEST\_URI} > [P,QSA,L] > RewriteRule ^/report/._$ balancer://admin\_cluster%{REQUEST\_URI} > [P,QSA,L] > > # All other URLs should be served by the texpert cluster > > RewriteRule ^/.\*$ balancer://main\_cluster%{REQUEST\_URI} [P,QSA,L] > > urls starting with /admin and /report go the the admin\_cluster, and > the others to the main\_cluster. > > Fred That looks perfect, I’ll give it a go. Thanks Fred! ---
**Author:** ![davidf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/f07891/32.png) [@davidf](https://www.ruby-forum.com/u/davidf)\ **Post date:** [August 14, 2008, 11:07pm UTC](https://www.ruby-forum.com/t/mod-proxy-balancer-question/145900/7 "2008-08-14T23:07:04Z")
Hi David, > > You can definitely change which mongrels you balance to based on the > > url. I wouldn’t be surprised if you could rewrite based on the content- > > type header (and all file uploads will have the multipart etc content > > type. > > Yeah the URL would be enough, there’s only one action that handles file > uploads. Can you give me any pointers on this, what would I need to > write in the conf file? Frederick is right – thanks for making me read up on my mod\_proxy knowledge! I was under the assumption that this required more expensive hardware balancing, so this is cool. Check out the ProxyPass directives at the mod\_proxy documentation at [mod\_proxy - Apache HTTP Server Version 2.2](http://httpd.apache.org/docs/2.2/mod/mod_proxy.html). It’s got ample examples. – Roderick van Domburg > **[De domeinnaam Nedforce.nl is te koop.](http://www.nedforce.nl)** > > Deze mooie domeinnaam kan al over een paar minuten van jou zijn. Betalen gaat eenvoudig en vertrouwd via iDEAL. Direct na de betaling ontvang je de verhuiscode per e-mail en kun je aan de slag.