ADSM-L

Re: Defining TSM Disk pools on ESS wisdom wanted

2003-03-27 05:30:49
Subject: Re: Defining TSM Disk pools on ESS wisdom wanted
From: "Marcel J.E. Mol" <marcel AT MESA DOT NL>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 27 Mar 2003 11:30:40 +0100
On Thu, Mar 27, 2003 at 10:25:15AM +0100, Daniel Sparrman wrote:
> Hi
> 
> I would suggest having as much volumes as possible. This is because AIX 
> treats every volume as a PV, and one PV can only do one write or read at a 
> time.

I guess this also depends on how tsm fills the volumes. If it just fills them
one by one you can just as well build larger volumes.

>From the description (e.g. san) I assume he uses sdd and has multiple hdisks
to the vpaths so several I/O's can go in parallel. In the end I think
the I/O performance mostly depends on how the ESS is configured.

-Marcel
> 
> So, using 24GB volumes is probably the best way to go.  Also, JFS 
> formatted volumes is the way to go.
> 
> Best Regards
> 
> Daniel Sparrman
> -----------------------------------
> Daniel Sparrman
> Exist i Stockholm AB
> Propellervägen 6B
> 183 62 TÄBY
> Växel: 08 - 754 98 00
> Mobil: 070 - 399 27 51
> 
> 
> 
> 
> "Anthonijsz, Marcel M SITI-ITDGE13" <Marcel.Anthonijsz AT SHELL DOT COM>
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> 2003-03-27 10:18
> Please respond to "ADSM: Dist Stor Manager"
>  
>         To:     ADSM-L AT VM.MARIST DOT EDU
>         cc: 
>         Subject:        Defining TSM Disk pools on ESS wisdom wanted
> 
> 
> Hi,
> 
> We are redefining our TSM disk pools on IBM ESS storage. We got 39 x 24 GB
> LUNs from our storage collegues. Total 936GB.
> LUNs are spread across the whole ESS. Now what is the best way, TSM wise 
> and
> performance wise to define these disks to TSM?
> 
> Make the volumes as large as possible?
> or define a volume per LUN, so I get 39 volumes of each 24GB?
> Use raw volumes or JFS formatted?
> 
> Almost forgot: we're running TSM 4.2.1.9 on AIX 4.3.3 ML10 (yes I do
> know....All going out of support soon).
> ESS is FC connected.
> 
> Thanks all for your eternal wisdom,
> 
> 
> Marcel Anthonijsz
> Central Data Storage Manager (a.k.a. storman)
> Shell Information Technology International B.V.
> PO Box 1027, 2260 BA  Leidschendam, The Netherlands
> 
> Tel: +31-70 303 4984
> Mob: +31-6 24 23 6522
> Email: Marcel.Anthonijsz.at.shell.com

-- 
     ======--------         Marcel J.E. Mol                MESA Consulting B.V.
    =======---------        ph. +31-(0)6-54724868          P.O. Box 112
    =======---------        marcel AT mesa DOT nl                 2630 AC  
Nootdorp
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