Which command did you use? "copy activedata" or "backup stgpool"?

On 2/16/07, Colwell, William F. <bcolwell AT draper DOT com> wrote:

Hi,

I did a little test of active-only pools and they do have inactive files
in them.
The way they differ from ordinary pools is that during reclaim all
inactive
versions will be squeezed out, whereas with ordinary pools only expired
versions
are.  Except at the very start of the AOP implementation there will
always be inactive versions.
You just can't reclaim that quickly.

You copypool will still have inactive version too unless you reclaim it
aggressively.

The feature is mis-named; it should be 'almost active-only if
aggressively reclaimed'.

I hope someone else will run some simple test of this.  When I did mine,
query contents
of the volumes showed the inactive files until the reclaim was done.

Bill Colwell
Draper Lab



-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
TSM_User
Sent: Thursday, February 15, 2007 2:02 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Active Only Storage Pools for DR

For years I've been asked by my customers if they could have many
versions for files in their primary pools while limiting the versions in
their copy pools to 1 for disaster recovery.

  In reading up on the new TSM V5.4 feature "Active-Only Storage Pools"
it looks like this is now a reality. I could create an Active-Only
storage pool (limited to backup data, no archive data). This new pool
would now become my new destination pool for my backup storage pool
command.  I could even go one step further and choose to collocate this
data by node. The end result would be a set of tapes at DR that would
not have to skip over any files when performing a restore.

  I realize great consideration has to be done before implementating
something like this because if the active file is corrupt you wouldn't
be able to recover a previous version. Still, in the case of DR I know I
have many customers that would accept the risk in order to reduce the
amount of data they have offsite and to speed up their restores.

  I know that you can set a tape in an active only storage pool to
offsite so I'm assuming that it will be included with move drm.  I still
haven't completed testing myself yet though.

  I'm wondering if anyone out there is considering this as well?


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