Re: [squid-users] RAID, 64bit and cache_dir size

From: Mark Elsen <mark.elsen@dont-contact.us>
Date: Thu, 12 Jan 2006 18:58:32 +0100

>
> I've been reading up in preparation for a deployment of Squid into a
> large enterprise cluster to extend our CDN, and I have been unable to
> determine solid answers for the following questions. Thanks in advance
> for any insight you guys can provide.
>
> I have read that RAID is a bad idea for squid caches, however I am
> unable to find any reasoning for this aside from performance concerns.
> I'm using aufs and don't really see a hit between cache_dir's on a fixed
> disk and those on an array...but then again, it's possible I'm not
> examining the right metrics. Has anyone had any problems with putting
> their cache_dir on a RAID?

   http://www.squid-cache.org/Doc/FAQ/FAQ-3.html#ss3.11

>
> Has anyone had any issues running Squid in a 64-bit environment? I
> plan to use Fedora Core 4 x86_64 and was wonding if anyone had any
> experiences (good or bad) with this.
>
> Finally, I'm interested in what was just asked about large
> cache_dir's: Is it better to have one large cache_dir (1 TB for example)
> or multiple smaller cache_dir's (5 x 200 GB) - I'm mostly concerned with
> performance and number of file descriptors. Each server will have 4 GB
> of RAM, which according to my math, should be plenty for this large of a
> cache...also worth noting that cached objects will be a minimum of
> around 500KB each.
>

  Itīs better to spread cache dirs over multiple disks, to spead phys io.

  M.
Received on Thu Jan 12 2006 - 10:58:42 MST

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