Re: Looking for a cheap upgrade (RAID)

Can WAL and the swap partition be on the same drive?

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

Chad,

> I realize that Im a raid on linux newbie so any suggestions are
appreciated.
> Im thinking I want to put this on an IDE Raid array, probably 0+1. IDE
seems
> 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)
disk
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