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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