Re: [squid-users] Hardware Recommendations

On 12.10 20:30, Timothy Bushart wrote:

Please, set up quoting in your mail client...

> On 12.10 14:13, TBUSHART@nycap.rr.com wrote:
> > Can anyone help and make any recommendations from their experiences for
> > hardware requirements for a new install of two LVS Load balancers
> > forwarding to two Squid Real Servers. I?ve got the LVS servers in
> > place, but for the squid boxes,
>
> > should I use multiple hard drives with
> > Raid 5 or Mirror two 15K SCSI drives,
>
> no! if RAID, only RAID1 (mirror), if you can afford it, read more on:
> http://www.squid-cache.org/Doc/FAQ/FAQ-3.html#ss3.11

> Raid 1, 2 146GB 15k SCSI Mirrored Drives for OS and Logs, and two partitions
> for cachedir's..

only one cache_dir on one drive (or mirror). Using more cache_dir's on the
same disk is just inefficient.

> could I get away with:
>
> cache_dir diskd /cache1 32000 16 256
> cache_dir diskd /cache2 32000 16 256
> (Each partition will be 64GB, only use 32GB for cache on each partition)

that should be OK, you can even use bigger cache (48GB)

> Recommendations call for one cache_dir per disk, but if you have two disks
> mirrored RAID1, does that mean use a single cache_dir.... or will two
> cache_dirs suffice?... because the larger the cache_dir the more memory
> used...

RAID1 here behaves as one disk and that means you should use single cache_dir
on it.

> Currently in production we have two squid servers - pentium III's 1.5GHZ's
> raid 5 (3 76GB Drives) with 4 cache_dirs...Only about a 1-2 second delay

if you set up no raid or raid1 here (and use one cache_dir per raid), you'd
probably notice berformance advantage, even with hardware raid, and
especially with software raid. maybe you won't need new machines at all :-)

> before a web page is brought up This is with cache_peer parents that are new
> McAfee webshield web scanners, and 2 new DNS servers that receive about 20
> queries/sec. This was inherited from someone that left the company. We have
> to upgrade and want to make sure performance increases with new hardware and
> doesn't decrease. I read somewhere some guy upgraded his squid system with
> new hardware and his users started complaining that the web slowed down, I
> trying not to be that guy, and I'm reading alot...www.squid-cache.org

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