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Re: Reverse Proxy Cluster Issues

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On Wed, 14 Apr 2010 08:13:01 -0500, <senad.cimic@xxxxxxxxxxxxxxxxxx>
wrote:
> Hi,
> 
> I am first time squid user and was wondering if could get some help. I
> tried to find answers to these questions on-line, but unsuccessfully... 
> 
> I have 2 squid boxes setup as reverse proxies in a cluster (they're
> using each other as siblings). On the backend I'm using single tomcat
> server that both squid boxes use to retrieve content. Squid version I'm
> using is 3.0. I'm running into couple issues:
> 
> Issue #1:
> Whenever squid box receives request for url that contains querystring
> (e.g. - http://site1:8080/RSSSource/rss/feed?max=1) it does not contact
> sibling cache for that resource, but it retrieves it from the backend
> server right away. What's odd is that it works (sometimes...) when query
> string is not present (e.g. http://site1:8080/RSSSource/rss/feed). 
> 
> Issue #2:
> Let's say squidA receives request for some resource (e.g.
> http://site1:8080/RSSSource/rss/feed). If squidA doesn't have it in its
> cache, it will check if it's available from squidB. However, if squidA
> has expired version of that resource, it doesn't contact squidB but
> retrieves it directly from the backend server, which should not be the
> case (it should check if squidB had valid copy available), correct? 
> 
> Here are relevant squid.conf lines for one of the squids (everything
> else is unchanged, config for the second squid is the same except for
> sibling references):

Nope.

The relevant lines are hierarchy_stoplist (prevent peers being asked for
query-string URLs).
and cache/no_cache controls (prevent "QUERY" ACL matches being stored
locally.)

Both of which need to be removed from your config.

Amos

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