From: Luke Lonergan <llonergan@greenplum.com>
To: Jeff Trout <threshar@torgo.978.org>
Cc: Mikael Carneholm <Mikael.Carneholm@WirelessCar.com>
Cc: Kjell Tore Fossbakk <kjelltore@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Performance with 2 AMD/Opteron 2.6Ghz and 8gig
Date: Fri, 28 Jul 2006 12:22:28 -0700
Message-ID: <C0EFB204.2B2A3%llonergan@greenplum.com> (raw)
In-Reply-To: <7A073C1C-BB04-42C7-A7B9-D25A18DB27D0@torgo.978.org>
Jeff,
On 7/28/06 10:31 AM, "Jeff Trout" <threshar@torgo.978.org> wrote:
> I'm still not sure about that software 10 read number. something is
> not right there...
It's very consistent with what we've seen before - the hardware RAID
controller doesn't do JBOD with SCSI command queuing like a simple SCSI
controller would do. The Smart Array 6402 makes a very bad SCSI controller
for software RAID.
The hardware results look very good - seems like the 2.6.17 linux kernel has
a drastically improved CCISS driver as compared to what I've previously
seen.
- Luke
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: llonergan@greenplum.com, threshar@torgo.978.org, Mikael.Carneholm@WirelessCar.com, kjelltore@gmail.com
Subject: Re: Performance with 2 AMD/Opteron 2.6Ghz and 8gig
In-Reply-To: <C0EFB204.2B2A3%llonergan@greenplum.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox