Re: [squid-users] store_dir_select_algorithm

On 13/01/11 16:39, Robert Pipca wrote:
> Hi all,
>
> I'm using a single AUFS cache_dir with 800GB on a RAID-0, 3 15K RPM disks.
>
> On peak hours it doesn't work very well, now that it has around 80GB
> of files (200,000 objects). The mean object size is 400KB.

http://wiki.squid-cache.org/SquidFaq/RAID

see the section on what RAID-0 does to Squid.

>
> I've been reading on how I can improve performance on peak hours, and
> I'm considering spreading on a few cache_dirs with:

Do it. Converting the RAID-0 into single-disk cache_dir will get you
some performance gain all by itself.

>
> store_dir_select_algorithm round-robin
>
> I'm thinking about doing around 10 80GB cache_dirs...
>
> Does anybody knows if it can help?

You says "3 15K RPM disks". Squid operates best with one cache_dir per
spindle (aka physical disk). I recommend 2 or 3 cache_dir, matching the
disks you have.

Amos

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