Re: [squid-users] High load server Disk problem

Hi!

On Tue, Aug 17, 2010 at 11:06 PM, Amos Jeffries <squid3_at_treenet.co.nz> wrote:
> On Tue, 17 Aug 2010 22:43:33 -0430, Jose Ildefonso Camargo Tolosa
> <ildefonso.camargo_at_gmail.com> wrote:
>> Hi!
>>
>> In my own personal opinion: your hard drive alone is not enough to
>> handle that much traffic (110MBytes/s, ~1Gbps).  See, most SATA hard
>> drives (7200rpm) gives around 50~70MB/s *sequential* read speed, your
>> cache reads are *not* sequential, so, it will be slower.  In my
>> opinion, you need something like a 8 drives RAID10 array, and/or use
>> faster disks (10k), or maybe 15k SAS disks.
>>
>> Also, I would put a minimum object size for disk of 1M, and a maximum
>> object size of whatever you want (this depends on your network, but
>> usually ~150MB is enough to fit almost any upgrade download). And for
>> RAM, I would put a maximum object size of 1M, with no minimum.  Thus,
>> keeping small files out of the disk cache.
>
> The COSS storage type he has setup already does this very efficiently with
> added disk-backing of the COSS chunks for cross-restart recovery of the
> cache.

Yeah, I missed that last night (I was sleepy, I guess), thanks God you
people are around!. Still, he would need faster disk access, unless
he is talking about 110Mbps (~12MB/s) instead of 110MB/s (~1Gbps).

So, Robert, is that 110Mbps or 1Gbps?

Thanks!

Ildefonso.
Received on Wed Aug 18 2010 - 13:52:59 MDT