From: lsorense@csclub.uwaterloo.ca (Lennart Sorensen)
To: david@lang.hm
Cc: Wakko Warner <wakko@animx.eu.org>,
Brendan Conoboy <blc@redhat.com>, Neil Brown <neilb@suse.de>,
linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org
Subject: Re: limits on raid
Date: Tue, 19 Jun 2007 16:11:11 -0400 [thread overview]
Message-ID: <20070619201111.GQ10008@csclub.uwaterloo.ca> (raw)
In-Reply-To: <Pine.LNX.4.64.0706181453090.14890@asgard.lang.hm>
On Mon, Jun 18, 2007 at 02:56:10PM -0700, david@lang.hm wrote:
> yes, I'm useing promise drive shelves, I have them configured to export
> the 15 drives as 15 LUNs on a single ID.
>
> I'm going to be useing this as a huge circular buffer that will just be
> overwritten eventually 99% of the time, but once in a while I will need to
> go back into the buffer and extract and process the data.
I would guess that if you ran 15 drives per channel on 3 different
channels, you would resync in 1/3 the time. Well unless you end up
saturating the PCI bus instead.
hardware raid of course has an advantage there in that it doesn't have
to go across the bus to do the work (although if you put 45 drives on
one scsi channel on hardware raid, it will still be limited).
--
Len Sorensen
next prev parent reply other threads:[~2007-06-19 20:11 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-15 2:58 limits on raid david
2007-06-15 3:05 ` Neil Brown
2007-06-15 3:43 ` david
2007-06-15 3:58 ` Neil Brown
2007-06-15 9:13 ` David Chinner
2007-06-15 22:21 ` Neil Brown
2007-06-15 11:10 ` Avi Kivity
2007-06-15 16:23 ` Jan Engelhardt
2007-06-15 17:20 ` Avi Kivity
2007-06-15 21:59 ` Neil Brown
2007-06-16 17:23 ` Avi Kivity
2007-06-17 13:00 ` Andi Kleen
2007-06-18 4:57 ` David Chinner
2007-06-21 2:56 ` Neil Brown
2007-06-21 6:39 ` David Chinner
2007-06-21 6:45 ` david
2007-06-21 8:59 ` David Greaves
2007-06-21 17:00 ` Mark Lord
2007-06-21 11:00 ` David Chinner
2007-06-21 12:40 ` Mattias Wadenstein
2007-06-21 14:40 ` Justin Piszcz
2007-06-21 16:48 ` david
2007-06-21 18:30 ` Martin K. Petersen
2007-06-21 20:08 ` Nix
2007-06-16 2:03 ` Wakko Warner
2007-06-16 3:47 ` Neil Brown
2007-06-16 4:40 ` Dan Merillat
2007-06-16 7:48 ` david
2007-06-16 13:38 ` David Greaves
2007-06-16 17:16 ` david
2007-06-17 17:16 ` Bill Davidsen
2007-06-18 17:20 ` Brendan Conoboy
2007-06-18 17:28 ` david
2007-06-18 18:03 ` Lennart Sorensen
2007-06-18 18:12 ` david
2007-06-18 18:33 ` Lennart Sorensen
2007-06-18 18:40 ` david
2007-06-18 19:11 ` Brendan Conoboy
2007-06-18 20:52 ` david
2007-06-18 21:46 ` Wakko Warner
2007-06-18 21:56 ` david
2007-06-18 22:00 ` Brendan Conoboy
2007-06-19 20:11 ` Lennart Sorensen [this message]
2007-06-19 20:51 ` david
2007-06-19 15:07 ` Phillip Susi
2007-06-19 19:28 ` david
2007-06-18 18:07 ` Brendan Conoboy
2007-06-18 18:16 ` david
2007-06-16 13:33 ` David Greaves
2007-06-17 1:44 ` dean gaudet
2007-06-21 3:01 ` Neil Brown
2007-06-21 8:49 ` David Greaves
2007-06-16 14:08 ` Wakko Warner
2007-06-17 1:47 ` dean gaudet
2007-06-17 13:28 ` Wakko Warner
2007-06-17 17:28 ` dean gaudet
2007-06-17 19:30 ` Wakko Warner
2007-06-17 19:54 ` dean gaudet
2007-06-17 20:46 ` david
2007-06-17 20:44 ` david
2007-06-17 17:14 ` Bill Davidsen
2007-06-21 23:03 ` Bill Davidsen
2007-06-22 2:24 ` Neil Brown
2007-06-22 8:10 ` David Greaves
2007-06-22 9:51 ` david
2007-06-22 12:39 ` David Greaves
2007-06-22 16:00 ` Bill Davidsen
2007-06-22 16:55 ` David Greaves
2007-06-22 18:41 ` david
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