Re: [squid-users] squid and SMP

> how well does squid take advantage of multiple CPUs on a machine? we will
be
> running squid on a dual cpu ultra2, and i would like to know if i am going
to
> take full advantage of that machine, or if i would be better off getting
it
> replaced with a faster single cpu box, or if running multiple squid
instances
> and load-balancing between them with the .pac file would have to be done.

Squid will only use the one CPU - this comes up all the time in the archives
so you should check there first: groups.google.com (use advanced and type in
mailing.unix.squid-users for group).

That said, I like having squid on my dual CPU ultra 60 because I *imagine*
that one cpu is babysitting squid and the other is handling all the OS
operations, etc. Squid's main needs/bottlenecks will always be disk and
RAM. In general my cpu loads are never over 20% of CPU so if it's a matter
of getting another box: get one with more disks and RAM. Though from your
previous post, I think you'd have to be pushing a lot of traffic to max out
the 3 dedicated 9GB disks you intended to attach to the Ultra2.

Hopefully someone else can comment on the .pac setup as we don't do that
here but I imagine you could do that. Since I think they'd have to be two
completely separate instances of squid with different cache_dir's, I think
that including setting put the .pac files, it would be more trouble than it
is worth. Given that squid runs on anything, adding another squid box and
then doing the same thing would probably be cleaner to maintain.

hth

Adam
Received on Thu Aug 07 2003 - 11:59:37 MDT