100-120GB was the IBM recommended limit based on their tests on a baseline
AIX system (Specs are lost to history).
I talked to the Watson Research guys at a Symposium quite a while ago on
this.
(The guy was from one of their east coast research places, and I'm
assuming it was Watson.  He was with IBM Global Services and described his
job as basically playing with all the hardware that came out and wrote
reports and guidelines for them.)

The idea was that if you have a faster system than their baseline, you can
go higher.  It was a general rule-of-thumb type of thing.

You can decide for yourself on your own hardware with your own data based
on how long your expirations/db backups take and if that's acceptable to
you.


Regards,
Shawn
________________________________________________
Shawn Drew





Internet
Richard.Mochnaczewski AT STANDARDLIFE DOT CA

Sent by: ADSM-L AT VM.MARIST DOT EDU
11/10/2009 11:51 AM
Please respond to
ADSM-L AT VM.MARIST DOT EDU


To
ADSM-L
cc

Subject
Re: [ADSM-L] TSM DB Size






We had a health check done by IBM when we were at TSM 5.3 and were told
they don't recommend a DB size higher than 120Gb for performance and
restore purposes.

Rich

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Kelly Lipp
Sent: Tuesday, November 10, 2009 11:48 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] TSM DB Size

The architectural limit is 500GB.  Practically, one should be a good bit
smaller.  It really boils down to how long do you want a restore of the
backed up DB to take?  Figure about 150% of the backup time for a
restore.  Can you live with that?

Kelly Lipp
Chief Technical Officer
www.storserver.com
719-266-8777 x7105
STORServer solves your data backup challenges.
Once and for all.

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Huebschman, George J.
Sent: Tuesday, November 10, 2009 9:42 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] TSM DB Size

We have DB's over 190 Gb in 5.5, on AIX servers:

 TSM_Server       CAP_GB     MAX_EXT_GB     PCT_UTIL     MAX_UTIL
-----------     -------     ----------     --------     --------
AIXPRODXYZ       191.95           0.00         89.4         89.4

AIXPRODDMZ       219.76           4.17         90.3         91.1

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Richard Mochnaczewski
Sent: Tuesday, November 10, 2009 11:35 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] TSM DB Size

Hi *,

Does anyone know what the maximum size database is for TSM 5.4 and TSM
5.5 ? We were told by IBM when we were at TSM 5.3 that 120Gb was the
limit and was wondering what the limit is for 5.4 and 5.5.

Currently running TSM 5.4.3.0 on AIX 5.3 TL 9.

Rich






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