Re: SAS Raid10 vs SATA II Raid10 - many small reads and writes

From: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
To: Phillip Berry <pberry(at)stellaconcepts(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: SAS Raid10 vs SATA II Raid10 - many small reads and writes
Date: 2010-03-10 07:32:41
Message-ID: dcc563d11003092332ye5bbafme1b7e67ef93886fd@mail.gmail.com
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On Tue, Mar 9, 2010 at 11:49 PM, Phillip Berry
<pberry(at)stellaconcepts(dot)com> wrote:
> Hi Everyone,
>
> We're in the market for a new DB server to replace our current one (yes it's one of *those*
> questions) ;).
>
> It'll have quad core Xeons, 36GB RAM and some sort of Raid 10 configuration.
>
> Our provider is pushing us towards 6 x SATA II disks in a Raid 10 configuration or 4 x SAS disks in
> Raid 10 (budget constraints).

Are those your only two options? No 6 SAS drives? Are you looking at
7200rpm or 10krpm SATA? 15krpm or 10krpm SAS? What RAID controller?
Battery backed Cache? Software RAID?

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