Theresa, what I am reading into your question is that you have a
requirement to maintain only a single backup version of each file in this
file system. In other words, the backup file space should reflect only the
current state of the actual file system (as of the time the backup is
taken). Is this an accurate summary?

In this case, you could use a copygroup with settings like this:

VEREXISTS=1
VERDELETED=0
RETEXTRA=0
RETONLY=0

The above settings assume the following:

- If someone deletes a file from the file system, you no longer require a
backup version for that file. The potential problem here is that if the
deletion was erroneous, then your window for restoring that file will be
somewhere between 0 and 24 hours (i.e. you'll have up to the time of the
next backup to restore the file).

- Similarly, if someone changes a file on the file system, then decides
they need to get the prior version of the file back, your restore window
is as described above.

This is one reason why I advocate configuring TSM by thinking in terms of
your RESTORE needs, not backup needs. If my assessment above isn't quite
right, perhaps you could describe the restore needs? That might be useful
in fine-tuning the policy settings.

Regards,

Andy

Andy Raibeck
IBM Software Group
Tivoli Storage Manager Client Development
Internal Notes e-mail: Andrew Raibeck/Tucson/IBM@IBMUS
Internet e-mail: storman AT us.ibm DOT com

The only dumb question is the one that goes unasked.
The command line is your friend.
"Good enough" is the enemy of excellence.




Theresa Sarver <tsarver.IFMC AT SDPS DOT ORG>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
07/18/2003 07:18
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Special Filesystem Backup



Hi all;

I have a filesystem that requires only 1 copy of the data on tape.  This
data however, needs to be kept more/less forever.  FYI...The rest of the
filesystems in this PD/PS/MC have the retention of 5/1/30/60.

I tried setting up an archive copy group for just this filesystem,
however, that is backing up (archiving) the entire filesystem everyday -
instead of only new files.  Is there something that I can do to make it
only archive new files?  Or do I just need to setup a backup copygroup
with the retention of 1/1/-/- for this lone filesystem?  If so, is there
any way around creating an entirely new PD, PS, MC for this 1 filesystem?

Thanks in advance for the help!
Theresa