Re: [squid-users] Cache Performance Tips

http://www.squid-cache.org/Benchmarking/
http://www.web-polygraph.org/

Production spec: I would get more RAM and more disks. Mirror only for
system disks, you can afford to lose the cache.

At the moment I am using striped cache disks, but striping does not
improve perfomance with squid but increases the chance of losing the
whole cache completely (thanks to Adam Aube for pointing this out).

With ATA I would use at least two or three disks for the cache only.
Squid depends heavily on disk performance.

If you are going to setup multiple caches you can probably use cheaper
but more machines to balance the load. This way you can achieve high
availability & high performance at moderate costs.

We are serving about 1000 Clients / 8...10GByte Traffic a day with a
single machine (Compaq ML370, 2GB RAM, 2.something GHz, 2x36GB SCSI for
the cache_dir), but I think at a tradeshow you can expect a much higher
usage of the clients.

Good luck,

Hendrik Voigtländer

Jerry Norton wrote:

> Thank you for the link..that was what I was looking for.
>
> Yes the DL360 will just be used for a demo. I am using squidGuard for
> redirection and blacklists and feel comfortble with that but the sheer
> volume of different settings in squid.conf has me a little worried.
>
> For the demo, the ACL's and blacklists will impress the most but I want
> to understand the caching better before the server gets thrown into the
> fire. Is there any way to auto stress test squid? Any apps or the
> like?
>
> If all goes well, we will implement squid in a tradeshow environment
> with about 500 computers. I have a request to purchase 2 bigger and
> faster servers that will be run as peers to load balance.
>
> Specs for production servers are follows:
>
> Debian Woody Stable
> P4 2.6 GHz / 512k cache
> 1 gb RAM
> (2) 80gb ATA HDD - probably be mirrored for failsafe
>
>
> Thanks for the help everyone!
> -jnorton
>
>
> -----Original Message-----
> From: Hendrik Voigtlaender [mailto:hendrik@voigtlaenders.net]
> Sent: Thursday, May 20, 2004 6:50 AM
> To: Jerry Norton
> Cc: squid-users@squid-cache.org
> Subject: Re: [squid-users] Cache Performance Tips
>
>
> Read this:
> http://www.devshed.com/c/a/Administration/High-Performance-Web-Caching-W
> ith-Squid
>
> I think this machine is not suitable for a bigger production environment
>
> - it wont hold enough disks.
> If you do a demo, you will probably have only a couple of clients? No
> need to tune the cache in this case.
>
> Otherwise I would suggest reiserfs on the cachedisk/partition. I would
> increase cache_mem and cache_dir size moderately.
>
> How do you define good impression? E.g. using delay pools, redirectors
> like squidGuard or authentication will probably impress people, but it
> is not really performance tuning...
>
> Regards, Hendrik.
>
> Jerry Norton wrote:
>
>
>>Hello all,
>>
>>I am new to squid and very impressed so far. I'm feeling a little
>>swamped though as I'm on a timeline to demo this for production. I
>>have the O'Reilly Squid book and have read through the first few
>>chapters and skimmed the rest. With so many config options, I was
>>hoping I could run my server specs by you all to get some suggestions
>>on tuning for performance. I'm just using the defaults currently.
>>
>>Server is a Compaq DL360, 800mhz, 1gb RAM, 9gb HDD.
>>
>>Anyone suggest any variables that I can change from the defaults and
>>why?
>>Again I'm just learning but I really need to make a good impression
>>fast.
>>
>>Thanks everyone for your help,
>>
>>.....................................................
>>Jerry Norton
>>broadGap Technologies
>>(801)763-8056 / (877)broadgap
>>802 East Bamberger Drive - American Fork - UT - 84003
>>.....................................................
>>
>>
>>
>>
Received on Thu May 20 2004 - 14:03:48 MDT