# How can I specify the location of the fragment cache? **URL:** \ **Category:** Rails\ **Created:** [September 17, 2007, 1:24pm UTC](https://www.ruby-forum.com/t/how-can-i-specify-the-location-of-the-fragment-cache/114696 "2007-09-17T13:24:19Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![raghus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@raghus](https://www.ruby-forum.com/u/raghus)\ **Post date:** [September 17, 2007, 1:24pm UTC](https://www.ruby-forum.com/t/how-can-i-specify-the-location-of-the-fragment-cache/114696/1 "2007-09-17T13:24:19Z")
I am using fragment caching - the cache gets stored under RAILS\_ROOT/ tmp/cache/www.mysite.com but if someone goes to [http://mysite.com](http://mysite.com) (no www) then, a _second_ cache gets stored at RAILS\_ROOT/tmp/cache/ [mysite.com](http://mysite.com) - from this point on, the cache is hit at both URL locations but I end up with 2X the DB hits and 2X over-the-wire web service calls etc I really need. This is turning out to be really really expensive. How can I avoid this? Any ideas? ---
**Author:** ![raghus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@raghus](https://www.ruby-forum.com/u/raghus)\ **Post date:** [September 17, 2007, 1:25pm UTC](https://www.ruby-forum.com/t/how-can-i-specify-the-location-of-the-fragment-cache/114696/2 "2007-09-17T13:25:35Z")
On Fri, 14 Sep 2007, raghus wrote: > I am using fragment caching - the cache gets stored under RAILS\_ROOT/ > tmp/cache/www.mysite.com but if someone goes to [http://mysite.com](http://mysite.com) (no > www) then, a _second_ cache gets stored at RAILS\_ROOT/tmp/cache/ > [mysite.com](http://mysite.com) - from this point on, the cache is hit at both URL > locations but I end up with 2X the DB hits and 2X over-the-wire web > service calls etc I really need. > > This is turning out to be really really expensive. How can I avoid > this? You can ensure they always visit the non-www version of your domain name. Here’s an Apache rewrite rule for that: RewriteCond %{HTTP\_HOST} !^mysite.com$ [NC] RewriteRule ^(.\*) [http://mysite.com/$1](http://mysite.com/$1) [L,R=301] – Greg D. Cyberfusion Consulting [http://cyberfusionconsulting.com/](http://cyberfusionconsulting.com/) ---
**Author:** ![raghus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@raghus](https://www.ruby-forum.com/u/raghus)\ **Post date:** [September 25, 2007, 11:05pm UTC](https://www.ruby-forum.com/t/how-can-i-specify-the-location-of-the-fragment-cache/114696/3 "2007-09-25T23:05:00Z")
> Any ideas? > Not a solution to your problem directly, but you may want to consider > 301 > redirecting all requests to [mysite.com](http://mysite.com) to [www.mysite.com](http://www.mysite.com). I know that Google will punish your page rankings if it sees the same content in multiple domains… As a side effect it would also solve your problem… -philip ---
**Author:** ![raghus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@raghus](https://www.ruby-forum.com/u/raghus)\ **Post date:** [September 25, 2007, 11:08pm UTC](https://www.ruby-forum.com/t/how-can-i-specify-the-location-of-the-fragment-cache/114696/4 "2007-09-25T23:08:12Z")
That’s an idea that would have the side-effect of solving my problem yes, but I don’t believe Google will punish PR between www and a plain [site.com](http://site.com). As you say multiple domains: perhaps between [alpha.com](http://alpha.com) and [beta.com](http://beta.com) if there’s exactly the same content, then… maybe. ---
**Author:** ![raghus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@raghus](https://www.ruby-forum.com/u/raghus)\ **Post date:** [September 25, 2007, 11:09pm UTC](https://www.ruby-forum.com/t/how-can-i-specify-the-location-of-the-fragment-cache/114696/5 "2007-09-25T23:09:57Z")
Greg D. wrote: > You can ensure they always visit the non-www version of your domain > name. Here’s an Apache rewrite rule for that: > > RewriteCond %{HTTP\_HOST} !^mysite.com$ [NC] > RewriteRule ^(.\*) [http://mysite.com/$1](http://mysite.com/$1) [L,R=301] Beware. If you have multiple sites running under the same domain this will lead to trouble with cookies and IE. That is if you have both [example.com](http://example.com) and [anotherapp.example.com](http://anotherapp.example.com). – Cheers, - Jacob A. ---
**Author:** ![raghus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@raghus](https://www.ruby-forum.com/u/raghus)\ **Post date:** [September 25, 2007, 11:10pm UTC](https://www.ruby-forum.com/t/how-can-i-specify-the-location-of-the-fragment-cache/114696/6 "2007-09-25T23:10:31Z")
You may be right… now that I think about it our problem was the individual hostnames vs www. It definitely punished us for that.