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Re: PowerEdge 2950 questions

From: "Merlin Moncure" <mmoncure(at)gmail(dot)com>
To: "Bucky Jordan" <bjordan(at)lumeta(dot)com>
Cc: "Scott Marlowe" <smarlowe(at)g2switchworks(dot)com>, "Jeff Davis" <pgsql(at)j-davis(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: PowerEdge 2950 questions
Date: 2006-08-24 20:29:24
Message-ID: b42b73150608241329x3a73ddf2l14f273df3a4975b4@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
On 8/24/06, Bucky Jordan <bjordan(at)lumeta(dot)com> wrote:
> Here's benchmarks of RAID5x4 vs RAID10x4 on a Dell Perc5/I with 300 GB
> 10k RPM SAS drives. I know these are bonnie 1.9 instead of the older
> version, but maybe it might still make for useful analysis of RAID5 vs.
> RAID10.

> ------ RAID5x4
i dont see the seeks here, am i missing something?

[raid 10 dd]
> 1024000000 bytes transferred in 45.565848 secs (22472971 bytes/sec)

ouch. this is a problem with the controller.  it should be higher than
this but the raid 5 should edge it out regardless.  try configuring
the hardware as a jbod and doing the raid 10 in software.

merlin

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