Glen (via Richard),

If your read my comments below, I did not say that move data would
"trigger expiration / reclamation".  Updating the reclaim threshold could
trigger reclaimation, which does basically the same thing as a move data.
I did not mention expiration, as I assumed it was being run if tapes were
at 85% reclaimable.  I find that "reclaimation" frequently makes poor
choices as to what to reclaim, so a quick "q vol" to a file, sorted
ascending on Pct Util shows the best candidates for my "move data" method
of reclaimation.  I give the list to the Operators here, and they
run/monitor it.  Once my "overflowing 3575-L12" gets it's L18 upgrade, and
all of my primary storage pool volumes fit inside, I may try reclaimation
again...



On Wed, 5 Apr 2000, Richard Sims wrote:

> Move Data doesn't trigger expiration / reclamation.
>
> Update Storage *storage-pool-name* Reclaim=xx  will potentially cause the
> reclamation threshold (for that stg pool) to move & thereby trigger 
> reclamation.
>
> rtm (Admin Guide) on expiration & reclamation.
>
> You can also trigger expiration manually with Expire Inventory.
>
>
> Glen Hattrup
> Tivoli Storage Manager
> Server Development Team
>
>
> Steven P Roder <tkssteve AT REXX.ACSU.BUFFALO DOT EDU>@VM.MARIST.EDU> on 
> 04/05/2000
> 07:27:53 AM
>
> Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
> Sent by:  "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
>
> To:   ADSM-L AT VM.MARIST DOT EDU
> cc:
> Subject:  Re: ADSM/Magstar 3570 Question
>
>
>
> >     The ensuing report tells me that my tape volumes are 'Full'
> >     although most of them are not 100 'Pct Util'. In fact one of
> >     the 'Full' tapes has a value of only 14.1 'Pct Util'.
> >
> >     What does this mean? Doesn't 'Pct Util' mean percent utilized?
> >     If so, how can a volume with only 14.1 percent utilized be 'Full'?
>
> The 14.1 percent means that the other 85.9% is occupied by old data that
> has been expired.  You need to either set a reclaim threshold on this tape
> pool that will cause reclaimation to run, or pick out the Full tapes with
> the lowest 'Pct Util', and issue move data commands against them.  In both
> cases (move data and relcaimation), the active data will be copied to
> another tape, freeing the tape for reuse (after the reuse time on the tape
> pool expires).
>
> See the help for command "move data", and "update stg", specifically the
> options "reclaim=" and "reuse=".  You can get an idea of how much space
> can be reclaimed by looking at the "Pct Util" of "q stg", and the command
> "q stg your-tape-pool f=d" to see the reuse and relcaim values.
>
> Steve Roder, University at Buffalo
> VM Systems Programmer
> UNIX Systems Administrator (Solaris and AIX)
> ADSM Administrator
> (tkssteve AT buffalo DOT edu | (716)645-3564 | 
> http://ubvm.cc.buffalo.edu/~tkssteve)
>
>


Steve Roder, University at Buffalo
VM Systems Programmer
UNIX Systems Administrator (Solaris and AIX)
ADSM Administrator
(tkssteve AT buffalo DOT edu | (716)645-3564 | 
http://ubvm.cc.buffalo.edu/~tkssteve)