Re: [squid-users] Squid Cache and Load Balancing...

Andy McCall wrote:
> Hi Folks,
>
> I am looking at setting up two Linux-based caching servers for two
> WebMarshal servers for around 120 schools. The WebMarshal servers
> perform all the content checking and Squid will do all the caching.
>
> The two WebMarshal servers are using Windows load balancing so I would
> like to have a similar configuration for the Squid servers. I
> understand I can share the cache's between the two Squid servers and I

Where did you hear that?

If you setup each squid as a sibling peer they can pull data from each
other instead of the network.

> have read around Pen, L7SW, LVS and keepalived but its not clear to me
> which bits I need to do what in the setup.

keepalived should not be needed, squid has RunCache built-in that does
the same job since 2.6.

>
> Please can someone give me some pointers as to what I would need to get
> load balanced / HA Squid cache servers without buying a dedicated piece
> of load balancing hardware.

cache_peer and peering algorithms. carp, round-robin,
weighted-round-robin, etc.

You usually want the WebMarshal's setup as 'parents' of the squid so the
squid cache any denials they issue.

However if load-balancing the squid is not practical or bndwidth is not
a huge issue you could reverse that and have squid caching everything
requested and the webmarshal's assigned a squid each as their source.

That would mean the squid receive only traffic load their child
webmarshall sends out. No special explicit balancing needed for the
squid itself.

>
> Thanks in advance for any replies,
>
> Andy McCall

Amos
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Received on Mon Dec 17 2007 - 05:38:20 MST