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Re: Testing Sandforce SSD

From: Greg Spiegelberg <gspiegelberg(at)gmail(dot)com>
To: Yeb Havinga <yebhavinga(at)gmail(dot)com>
Cc: Matthew Wakeling <matthew(at)flymine(dot)org>, Greg Smith <greg(at)2ndquadrant(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Testing Sandforce SSD
Date: 2010-07-26 16:26:45
Message-ID: AANLkTikSLLcUKdD=mZhN4MnSyUAvmgGqnmPCFKdmXbAJ@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
On Mon, Jul 26, 2010 at 10:26 AM, Yeb Havinga <yebhavinga(at)gmail(dot)com> wrote:

> Matthew Wakeling wrote:
>
>> Apologies, I was interpreting the graph as the latency of the device, not
>> all the layers in-between as well. There isn't any indication in the email
>> with the graph as to what the test conditions or software are.
>>
> That info was in the email preceding the graph mail, but I see now I forgot
> to mention it was a 8.4.4 postgres version.
>
>
Speaking of the layers in-between, has this test been done with the ext3
journal on a different device?  Maybe the purpose is wrong for the SSD.  Use
the SSD for the ext3 journal and the spindled drives for filesystem?
Another possibility is to use ext2 on the SSD.

Greg

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