From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: adam radford <aradford@gmail.com>
Cc: dean gaudet <dean@arctic.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Jan Kasprzak <kas@fi.muni.cz>,
linux-kernel@vger.kernel.org
Subject: Re: 3ware disk latency?
Date: Wed, 26 Jul 2006 18:10:02 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0607261809350.6441@p34.internal.lan> (raw)
In-Reply-To: <b1bc6a000607261507g663ad95cwcc4a2ae4622e0fa2@mail.gmail.com>
On Wed, 26 Jul 2006, adam radford wrote:
> On 7/26/06, dean gaudet <dean@arctic.org> wrote:
>>
>> unfortunately when i did the experiment i neglected to perform
>> simultaneous tests on more than one 3ware unit on the same controller. i
>> got great results from a raid1 or from a raid10 (even a raid5)... but
>> never i only tested one unit at a time.
>>
>
> Did you try setting /sys/class/scsi_host/hostX/cmd_per_lun to 256 / num_units
> ?
>
> -Adam
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> Please read the FAQ at http://www.tux.org/lkml/
>
Speaking of this does anyone having any tuning guides for running 10 disk
raid 5's on this controller? And as far as ext3 goes, what are the best
optimizations?
next prev parent reply other threads:[~2006-07-26 22:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-10 14:13 Jan Kasprzak
2006-07-26 16:52 ` dean gaudet
2006-07-26 20:37 ` Alan Cox
2006-07-26 21:53 ` dean gaudet
2006-07-26 22:07 ` adam radford
2006-07-26 22:10 ` Justin Piszcz [this message]
2006-07-26 22:48 ` Jeff V. Merkey
2006-07-26 22:20 ` adam radford
2006-07-27 3:00 ` dean gaudet
2006-07-27 13:42 ` Jan Kasprzak
2006-07-27 12:11 ` Jan Kasprzak
2006-07-27 18:30 ` David Lang
2006-08-02 11:48 Dieter Stüken
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