Re: Creating two tape copies offsite with each has Different Retention

Ah, this again.

Your mananger needs to be taken out back and beaten until agreeing to both
read ITSM concepts manual and be subjected to a quiz.  :-O)

TSM manages DATA via mgmtclass parameters you specify.  IE, x number
versions kept for so many days, etc.  and into which primary pool should
the data flow.  The storage pool heirarchy is managed directly by
migration, reclaim and reuse parameters.  The logical management of data
versus physical management of media don't have any direct tie.  There is
nothing is the storage pool hierarchy which says 'oh BTW, everyting in
this container (tape) is worthless (can be deleted) after x amount of
time'. Expiration processing is what marks areas on tape as 'unused'
(expired inactive files) and adjusts percent used.  Reclamation looks at
percent used and selects tapes that are candidates.

Sorry for the tounge-in-cheek response, but this is THE single most
difficult concept for management/old school backup pro's to understand.

So the answer is you can't do what he wants.






Edgardo Moso <edgardo_moso AT KINDREDHEALTHCARE DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
03/12/03 12:19 PM
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Creating two tape copies offsite with each has 
Different Retention


Hello Fellow TSMERs,

This is quite a wild idea but I just would like to solicit your opinions
if
how could I satisfy the the requiremetn asked by manager. He wants in one
backup instance to create two copies for the two copy storage pools one
for
onsite and one for OFFSITE.  I know this can be done in TSM 5.1.  Aside
from this he added that each of this shoudl have different retentions.
Say, onsite is 15 days retention and offsite  is only 7 days.   I tried
reading the technical manual of TSM 5.1 but I think it's impossible to do
this unless I will apply the concept of backup set.    I don't think the
new features of TSM 5.1 inlcudes this. What do you think, gurus?

If I used the backupset, does anybody of you have experience on this?  How
does the backupset performance behaves in the new TSM 5.1?

Any ideas are greatly appreciated.

Thanks,

Edgardo Moso