Re: [squid-users] parent cache information

Hi Chris,

Thanks for your reply. I checked squid -v output on both servers.

/opt/squid/sbin/squid -v
Squid Cache: Version 2.5.STABLE10
configure options: --prefix=/opt/squid --enable-auth=ntlm,basic
--enable-external-acl-helpers=wbinfo_group --localstatedir=/var/squid
--enable-snmp

"--enable-storeio=ufs,aufs" is not there. Can I still change the
cache_dir line to use aufs.

I don't have proxy-only option on the cache_peer line on Server B.
Below is the cache_peer option on server B.

cache_peer ServerA parent 3128 3130 weight=15 no-query no-digest
cache_peer ServerC parent 3128 3130 weight=10 no-query no-digest

Should I change the above lines to

cache_peer ServerA parent 3128 3130 no-digest proxy-only
cache_peer ServerC parent 3128 3130 no-digest proxy-only

Please advise.

Regards.

On 2/17/06, Chris Robertson <crobertson@gci.com> wrote:
> > -----Original Message-----
> > From: Raj [mailto:sunfire2005@gmail.com]
> > Sent: Thursday, February 16, 2006 12:47 PM
> > To: squid-users@squid-cache.org
> > Subject: [squid-users] parent cache information
> >
> >
> > Hi All,
> >
> > I have 2 servers A and B both running Squid 2.5.STABLE10. Server A is
> > a parent server which is sitting on the DMZ segment. Server B is a
> > child proxy server which is in LAN (local network). On both servers
> > below is the cache_dir configuration.
> >
> > cache_dir ufs /var/squid/cache 400 16 256
> >
>
> Run squid -v and look for "--enable-storeio=ufs,aufs". If you see it, change the cache_dir line to use aufs. You will likely see a performance increase, even on a lightly loaded proxy.
>
> > I was not the one who configured these proxy servers. I took over
> > somone else recently. Is it necessary to configure cache_dir on both
> > the servers. Can I do all the caching on server B (child server). Are
> > there any benefits if I configure both the servers to cache. How does
> > this caching work if I have cache_dir enabled on both the servers? If
> > I access lets say google.com, does the server A caches the URL or both
> > A & B. Below are the access logs on both the servers
>
> See below.
>
> >
> > Server A (Parent server):
> >
>
> SNIP
>
> >
> >
> > Server B (Child):
> >
>
> SNIP
>
> >
> > If you look at the above logs Server A goes direct all the time. Does
> > it mean it is not caching anything eventhough cache_dir is enabled?
>
> This just means that server A doesn't have a parent that it queries, not that the request is somehow bypassing the proxy.
>
> > What is the best way to configure in this situation? Activate cache on
> > both the servers or just on server B?
>
> The answer to this question depends entirely on the cache_peer line on server B. If you see the term proxy-only, then using the cache_dir on both is going to be fine (this will mean that anything found on the parent server will not be cached locally). Without the proxy-only directive, the two proxies have a much greater chance of overlapping cached content.
>
> >
> > Any help would be really appreciated.
> >
>
> Chris
>
Received on Thu Feb 16 2006 - 16:39:15 MST