Re: 3ware disk latency?

[Justin Piszcz]

On Wed, 26 Jul 2006, adam radford wrote:

> On 7/26/06, dean gaudet <dean@xxxxxxxxxx> 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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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?

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