I have an offsite tape with a 60 Gig capacity that has only 3 Gig of data on
it. We have a retention period of 30 days for previous versions of files
and 7 years for deleted files. As I see it the data on this tape will not
even start to expire for 30 days. It is likely that the data on this tape
will not hit the 60% reclaim limit for six months or more. This means that
I will send off another 180 tapes before any are returned. I don't have 180
tapes.
So while the reclamation process would work, in this case it does not seem
practical. Is it true that the reclamation process looks at the same Pct.
Reclaimable Space that I see when I run "q vol stg=copypool f=d". While I
know that the tape can hold a lot more data, does TDM?
-----Original Message-----
From: Richard Sims [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, January 24, 2001 12:02 PM
To: [EMAIL PROTECTED]
Subject: Re: Does Reclamation work for Tape Capacity?
>...I want to combine these 40 copypool tapes onto only 2 or 3
>copypool tapes. I had one person tell me that the reclamation
>process should do this for me.
Scott - Reclamation will certainly combine tapes...
but how much can be reclaimed and how quickly depends
upon your retention policies and Expiration being run. The rate at
which you will see tape data compaction thus "depends": the numbers
you see out of Expirations will be your gauge, combined with the
rate at which the Pct Util value on volumes declines.
Note that some offsite storage vendors are getting into providing
electronic vaulting services, which will alleviate the chronic
problems we all have with partially full tapes and all the painful
tape handling and schlepping involved. I would think that Tivoli
would be working with such vendors to develop compatible and mutually
beneficial facilities.
Richard Sims, BU
