From: Greg Stark <gsstark@mit.edu>
To: Alex Turner <armtuk@gmail.com>
Cc: Greg Stark <gsstark@mit.edu>, Arshavir Grigorian <ag@m-cam.com>,
linux-raid@vger.kernel.org, pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Postgres on RAID5
Date: 14 Mar 2005 15:17:11 -0500 [thread overview]
Message-ID: <87zmx6rni0.fsf@stark.xeocode.com> (raw)
In-Reply-To: <33c6269f050314115339b6861d@mail.gmail.com>
Alex Turner <armtuk@gmail.com> writes:
> a 14 drive stripe will max out the PCI bus long before anything else,
Hopefully anyone with a 14 drive stripe is using some combination of 64 bit
PCI-X cards running at 66Mhz...
> the only reason for a stripe this size is to get a total accessible
> size up.
Well, many drives also cuts average latency. So even if you have no need for
more bandwidth you still benefit from a lower average response time by adding
more drives.
--
greg
next prev parent reply other threads:[~2005-03-14 20:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-11 19:48 Postgres on RAID5 Arshavir Grigorian
2005-03-14 4:36 ` [PERFORM] " Greg Stark
2005-03-14 7:44 ` [PERFORM] Postgres on RAID5 (possible sync blocking read type issue on 2.6.11) David Greaves
2005-03-14 19:53 ` [PERFORM] Postgres on RAID5 Alex Turner
2005-03-14 20:17 ` Greg Stark [this message]
2005-03-14 20:35 ` Jim Buttafuoco
2005-03-14 21:03 ` Arshavir Grigorian
2005-03-14 22:47 ` Michael Tokarev
2005-03-14 23:49 ` Guy
2005-03-15 16:17 ` Effect of Stripe Size (was Postgres on RAID5) Ruth Ivimey-Cook
2005-03-16 16:47 ` Postgres on RAID5 David Dougall
2005-03-16 16:55 ` Michael Tokarev
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