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
--
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=======--------- marcel AT mesa DOT nl 2630 AC
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