Re: squid storage: stripes vs separate drives for cache dirs

On Sat, 3 Apr 1999, Henrik Nordstrom wrote:

> squid-list@vsu.ru wrote:
>
> > what is considered better if we have 2 (or 5, or 7) 4Gb fast wide scsi
> > hard disks: make a single stripe for squid cache, or put different
> > cache directories to each disk?
>
> My recommendation is one cache_dir on each drive. Squid does not benefit
> from striping, and having one large striped disk makes you loose all
> your cache if one drive should fail.
>
> --
> Henrik Nordstrom
> Spare time Squid hacker

To add a data point to this debate, I have two identical Solaris 7
machines with identical diskpacks on them. On one I have striped up the 6
disks and am using a logging filesystem using ODS. On the other I'm using
the logging filesystem now part of Solaris on each of the 6 disks mounted
as separate cache directories.

The performance difference between the two machines at their current
loading is negligable. Therefore the benefit of not loosing all your
cache when you blow or add disk is probably as good a reason as another
for chosing multiple cachedirs.

John
Received on Sat Apr 03 1999 - 09:46:50 MST