You can assign a different management class to full and differentials.
I have defined them to different tape storage pools.

One policy domain with multiple management class define

backup node emcnode /vfs mode=full wait=yes mgmt=full-class

backup node emcnode /vfs mode=DIFFerential wait=yes mgmt=diff-class

If an old full dump expires, all differentials that depends on it will
also expire.

Differentials can expire without affecting the full dump.


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Prather, Wanda
Sent: Wednesday, May 04, 2011 1:24 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Policy for NDMP dumps

Have a customer where we have successfully configured and run NDMP full
dumps of an EMC NAS via TSM, to a storage pool with format=CELERRA (it's
an EMC NAS head).

Now the amount of data has grown so that we would like to run
differentials instead of fulls.
Looks to me like there is no way to assign a different mgmt. class to
NDMP differentials than to fulls, is that correct?

Also, I found in the doc that these options are ignored in the backup
copy group definition:

Frequency
Mode
Retain Only Versions
Serialization
Versions Data Deleted

Does TSM know not to remove a differential NDMP backup if the full still
exists?


Wanda Prather  |  Senior Technical Specialist  |
wprather AT icfi DOT com<mailto:wprather AT icfi DOT com>  |
www.jasi.com<www.jasi.com%20>
ICF Jacob & Sundstrom  | 401 E. Pratt St, Suite 2214, Baltimore, MD
21202 | 410.539.1135