From: PFC <lists@boutiquenumerique.com>
To: Joshua D. Drake <jd@commandprompt.com>
To: Dave Cramer <pg@fastcrypt.com>
Cc: Michael Ben-Nes <miki@canaan.co.il>
Cc: pgsql-performance@postgresql.org
Subject: Re: Advice on RAID card
Date: Sun, 25 Sep 2005 18:08:27 +0200
Message-ID: <op.sxn1sdofth1vuj@localhost> (raw)
In-Reply-To: <4336C57B.6090800@commandprompt.com>
References: <IGEGINLEEDLANNHAAKCMOECJCCAA.gaulakh@ecmarket.com>
<op.sxll3du6th1vuj@localhost>
<43367937.40809@canaan.co.il>
<ABE6B997-2C1E-43B1-9F18-28F54B1620FE@fastcrypt.com>
<4336C57B.6090800@commandprompt.com>
> The common explanation is that CPUs are so fast now that it doesn't make
> a difference.
> From my experience software raid works very, very well. However I have
> never put
> software raid on anything that is very heavily loaded.
Even for RAID5 ? it uses a bit more CPU for the parity calculations.
An advantage of software raid, is that if the RAID card dies, you have to
buy the same one ; whether I think that you can transfer a bunch of
software RAID5 disks to another machine if the machine they're in dies...
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To: pgsql-performance@postgresql.org
Cc: lists@boutiquenumerique.com, jd@commandprompt.com, pg@fastcrypt.com, miki@canaan.co.il
Subject: Re: Advice on RAID card
In-Reply-To: <op.sxn1sdofth1vuj@localhost>
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