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Re: Looking for a cheap upgrade (RAID)

From: "Chad Thompson" <chad(at)weblinkservices(dot)com>
To: <josh(at)agliodbs(dot)com>,"pgsql-performance" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Looking for a cheap upgrade (RAID)
Date: 2003-05-02 20:53:33
Message-ID: 0c9a01c310ec$e5605d90$32021aac@chad (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Can WAL and the swap partition be on the same drive?

----- Original Message -----
From: "Josh Berkus" <josh(at)agliodbs(dot)com>
To: "Chad Thompson" <chad(at)weblinkservices(dot)com>; "pgsql-performance"
Sent: Friday, May 02, 2003 2:10 PM
Subject: Re: [PERFORM] Looking for a cheap upgrade (RAID)


> I realize that Im a raid on linux newbie so any suggestions are
> Im thinking I want to put this on an IDE Raid array, probably 0+1. IDE
> to be cheap and effective these days.
> What ive been able to glean from other postings is that I should have 3
> drives, 2 for the database w/ striping and another for the WAL.

Well, RAID 0+1 is only relevant if you have more than 2 drives.  Otherwise,
it's just RAID 1 (which is a good choice for PostgreSQL).

More disks is almost always better.  Putting WAL on a seperate (non-RAID)
is usually a very good idea.

> I would also appreciate raid hardware suggestions (brands, etc)
> And as always im not afraid to RTFM if someone can point me to the FM :-)

Use Linux Software RAID.    To get hardware RAID better than Linux Software
RAID, you have to spend $800 or more.

-Josh Berkus
 Aglio Database Solutions
 San Francisco

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Subject: Re: Looking for a cheap upgrade (RAID)
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