From: Kenji Morishige <kenjim@juniper.net>
To: Thomas F. O'Connell <tfo@sitening.com>
Cc: pgsql-performance@postgresql.org
Cc: kenjim@juniper.net
Subject: Re: most bang for buck with ~ $20,000
Date: Tue, 8 Aug 2006 15:07:45 -0700
Message-ID: <20060808220745.GC6418@juniper.net> (raw)
In-Reply-To: <9EE66C7F-0B04-4472-9EBD-CD567AC9EA1D@sitening.com>
References: <20060808204354.GN29379@juniper.net>
<44D906E1.7010405@commandprompt.com>
<9EE66C7F-0B04-4472-9EBD-CD567AC9EA1D@sitening.com>
The 1+0 on the WAL is better than on PGDATA? I guess I'm confused about the
write sequence of the data. I will research more, thank you!
-Kenji
On Tue, Aug 08, 2006 at 04:59:09PM -0500, Thomas F. O'Connell wrote:
>
> On Aug 8, 2006, at 4:49 PM, Joshua D. Drake wrote:
>
> >>I am considering a setup such as this:
> >> - At least dual cpu (possibly with 2 cores each)
> >> - 4GB of RAM
> >> - 2 disk RAID 1 array for root disk
> >> - 4 disk RAID 1+0 array for PGDATA
> >> - 2 disk RAID 1 array for pg_xlog
> >>Does anyone know a vendor that might be able provide such setup?
>
> Wouldn't it be preferable to put WAL on a multi-disk RAID 10 if you
> had the opportunity? This gives you the redundancy of RAID 1 but
> approaches the performance of RAID 0, especially as you add disks to
> the array. In benchmarking, I've seen consistent success with this
> approach.
>
> --
> Thomas F. O'Connell
> Sitening, LLC
>
> http://www.sitening.com/
> 3004B Poston Avenue
> Nashville, TN 37203-1314
> 615-469-5150 x802
> 615-469-5151 (fax)
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: kenjim@juniper.net, tfo@sitening.com
Subject: Re: most bang for buck with ~ $20,000
In-Reply-To: <20060808220745.GC6418@juniper.net>
* 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