ADSM-L

Re: 2 3494 Tape libraries seem to have very different capacities. Any ideas?

2004-08-23 14:58:17
Subject: Re: 2 3494 Tape libraries seem to have very different capacities. Any ideas?
From: David E Ehresman <deehre01 AT LOUISVILLE DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Mon, 23 Aug 2004 14:58:21 -0400
So you have about 2 gig of data that hasn't migrated over.  Seems
reasonable.

The following query will tell you if you're getting the same amount of
data on full tapes:

tsm: ULTSM>select devclass_name,cast(avg(est_capacity_mb)/1024 as
decimal(5,2))
as "GB/Tape" from volumes where status='FULL' group by devclass_name

David

>>> jdury AT DUQLIGHT DOT COM 8/23/2004 2:28:34 PM >>>
Here is the output from that command. It looks pretty similar to me. I
also
checked compression for both local and remote libraries. All are on.
We
also run a job every night that deletes the dbb volhistory which
allows
only 2 days of retention. (del volhist type=dbb todate=today-2)

 STGPOOL_NAME: 3494LOCAL
  Unnamed[2]: 38531539
  Unnamed[3]: 11776076.83
  Unnamed[4]: 11886072.01

STGPOOL_NAME: 3494REMOTE
  Unnamed[2]: 38513745
  Unnamed[3]: 11773755.03
  Unnamed[4]: 11876887.56

These are all great suggestions which is why I asked here but I'm still
at
a complete loss.
John

 The output from "select
 stgpool_name,sum(num_files),sum(logical_mb),sum(physical_mb) from
 occupancy group by stgpool_name" should give some indication of
whether
 the same amount of stuff is getting to the remote storagepools.

 David

 >>> jdury AT DUQLIGHT DOT COM 8/23/2004 1:26:57 PM >>>
       We have 2 3494 tape libraries. One is local and the other is
 remote.
 The local one (3494LOCAL) receives all the data from the nightly
 backups as
 it gets migrated from disk. The remote one (3494REMOTE) is only used
as
 the
 target of backing up the 3494LOCAL storage pool which gets done
 everyday
 during the day. 3494LOCAL has 577 library volumes in it. 3494REMOTE
has
 494
 library volumes in it. Both tape libraries only have 3590K tapes in
 them.
       My problem is that 3494LOCAL has 62 scratch tapes available and
 3494REMOTE has 207 scratch tapes in it. Reclamation runs daily and
sets
 the
 same percentage (57) for both libraries. How can there be such a huge
 difference in the number of scratch tapes if both libraries should
 roughly
 have the same amount of data? It's making me a little nervous that
 3494REMOTE doesn't have the same data or something somewhere is going
 wrong.
 Any ideas?
 Thanks,
 John

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