linux-kernel - Re: 3ware disk latency?

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Message-ID: <44C7F135.7000509@wolfmountaingroup.com>
Date:	Wed, 26 Jul 2006 16:48:21 -0600
From:	"Jeff V. Merkey" <jmerkey@...fmountaingroup.com>
To:	adam radford <aradford@...il.com>
CC:	dean gaudet <dean@...tic.org>, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Jan Kasprzak <kas@...muni.cz>, linux-kernel@...r.kernel.org
Subject: Re: 3ware disk latency?

adam radford wrote:

> On 7/26/06, dean gaudet <dean@...tic.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
> -
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Adam,

Isn't it set to this by default or is the default 128?

Jeff
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