From: Marc Bevand <bevand_m@epita.fr>
To: linux-raid@vger.kernel.org
Subject: Re: 1x 3ware controllers vs. 2x 3ware controllers
Date: Fri, 30 Jul 2004 17:00:51 +0200 [thread overview]
Message-ID: <cedoda$qn4$1@sea.gmane.org> (raw)
In-Reply-To: <200407300815.18296.mrwatts@fast24.co.uk>
Mark Watts wrote:
> With the performance issues I'm seeing with the 8506-4LP's I have, I wouldn't
> recommend them to anyone currently...
>
> The thread on LKML from a few days ago about mke2fs -j and 8506-4LP says it
> all, but basically and reasonable amount of I/O brings a Dual Opteron system
> to its knees.
> And by reasonable I mean copying ISO images from a usb2 drive to a raid 5 (4 x
> 250GB maxtor) or even just formatting a 600MB partition.
I would be interested to see the output of 'vmstat 1' while your system is
so slow.
IMHO you shouldn't draw such conclusion ("reasonable amount of I/O brings a
Dual Opteron system to its knees") from your particular case. The 3 HT links
of the Opteron make this CPU particularly adapted to I/O operations.
Personnaly, on a dual Opteron, I am able to read datas from 4 SATA disks at
about 225 MB/s, with CPU time used at about 32%, awd with a system still
reasonably responsive.
--
Marc Bevand http://www.epita.fr/~bevand_m
Computer Science School EPITA - System, Network and Security Dept.
next prev parent reply other threads:[~2004-07-30 15:00 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-30 3:53 1x 3ware controllers vs. 2x 3ware controllers Adam Hunt
2004-07-30 4:50 ` Scott T. Smith
2004-07-30 6:45 ` Luca Berra
2004-07-30 7:15 ` Mark Watts
2004-07-30 7:22 ` Mark Watts
2004-07-30 8:14 ` Scott T. Smith
2004-07-30 15:00 ` Marc Bevand [this message]
2004-07-30 16:17 ` Mark Watts
2004-07-30 23:53 ` Jim Buttafuoco
2004-07-31 8:49 ` Mikael Abrahamsson
2004-07-31 14:24 ` Jon Lewis
2004-07-31 16:28 ` Mikael Abrahamsson
2004-07-31 16:42 ` Mark Watts
2004-07-31 17:40 ` Jurriaan
2004-08-01 7:00 ` Mikael Abrahamsson
2004-08-01 7:08 ` Gordon Henderson
2004-08-01 9:18 ` Mikael Abrahamsson
2004-08-01 9:51 ` Mark Watts
2004-08-01 12:11 ` Mikael Abrahamsson
2004-08-01 15:01 ` Mark Watts
2004-08-01 15:10 ` Jim Buttafuoco
2004-08-01 15:27 ` Mikael Abrahamsson
2004-08-01 15:33 ` Mark Watts
2004-08-01 17:18 ` Gordon Henderson
2004-08-02 12:54 ` Mark Watts
2004-08-02 13:04 ` Gordon Henderson
2004-08-02 9:40 ` Mark Watts
2004-08-03 1:58 ` [RAID] " Julian Cowley
2004-08-03 2:05 ` Definition of hotswap, was " Scott T. Smith
2004-08-03 11:55 ` Tim Small
2004-08-22 17:52 ` Maurice Hilarius
2004-08-03 11:47 ` Software vs. Hardware RAID Tim Small
2004-08-03 15:58 ` Ricky Beam
2004-08-01 15:06 ` 1x 3ware controllers vs. 2x 3ware controllers Jim Buttafuoco
2004-08-01 15:24 ` Mikael Abrahamsson
2004-08-01 17:57 ` Scott T. Smith
2004-08-01 19:28 ` David Greaves
2004-08-01 22:32 ` Mikael Abrahamsson
2004-08-02 18:02 ` Mark Hahn
2004-08-02 18:07 ` Scott T. Smith
2004-08-01 17:53 ` Scott T. Smith
2004-08-02 10:22 ` what is the best multi-SATA-controller-on-a-single-board out there? Tim Small
2004-08-02 21:09 ` Jon Lewis
2004-08-02 22:48 ` robin-lists
2004-08-03 8:55 ` Tim Small
2004-08-03 17:45 ` Jon Lewis
2004-08-04 8:24 ` Tim Small
2004-07-31 13:11 ` 1x 3ware controllers vs. 2x 3ware controllers Joshua Baker-LePain
-- strict thread matches above, loose matches on Subject: below --
2004-07-30 10:16 Mark Watts
2004-07-30 12:59 ` Joshua Baker-LePain
2004-07-30 13:24 ` Mark Watts
2004-07-30 13:30 ` Joshua Baker-LePain
2004-07-31 8:44 ` Mikael Abrahamsson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='cedoda$qn4$1@sea.gmane.org' \
--to=bevand_m@epita.fr \
--cc=linux-raid@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.