Re: ESS transfer rate

From: Clifton, Pablo (Pablo.Clifton@VALERO.COM)
Date: Mon Jun 24 2002 - 16:24:39 EDT


Abdu-

For the IBM SHARK ESS- IBM advertises:

        47MB/sec max thruput per rank
        (a rank is a group of 8 disks ( or 7 if that rank contains a spare))
        [ Remember- if multiple hosts share luns on the same rank- then
        they will share that thruput ]

If you stripe a filesystem across mulitple ranks (9+), you should be able to
max out a FC card for sequential reads- over 100MB/sec. I've been able to
push 200MB/sec over 2 FibreChannel cards to a host.

Max thruput for the entire SHARK is 380MB/sec.

-pablo

---
> Pablo Clifton
> Valero Energy Corporation / IT Dept.
> Office: (210) 592.4021   Fax:    (210) 370.5113
>        Pager: (877) 466.5904   or 8774665904@skytel.com
>        Email: pablo.clifton@valero.com
>
>  -----Original Message-----
> From:         IBM AIX Discussion List <aix-l@Princeton.EDU>@PEUSA   On
> Behalf Of abdellah.djebli@SICKKIDS.CA
> Sent: Friday, June 21, 2002 1:21 PM
> To:   aix-l@Princeton.EDU
> Subject:      ESS transfer rate
>
> Hi All,
>
> Does anyone know what IBM advertise for their average transfer rate for
> ESS.
> Not the back-end bandwidth but transfer rate to the host.
> Thank you much.
> abdu


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