ADSM-L

Re: Reclamation is not happening - HELP!

2002-05-23 08:47:51
Subject: Re: Reclamation is not happening - HELP!
From: Samiran Das <sdas AT COSMOS.DCMDS.CO DOT IN>
Date: Thu, 23 May 2002 18:19:06 +0530
This slowness can happen when reclamation is done from primary storage pool
tapes also. Assume content of the offsite tape is scattered over multiple
on site tapes and tape drive has to seek to multiple location on tape to
pick up required piece of data can add up to significant tape
loading/unloading and tape seek operation. So it is not unusual for an old
offsite tape  to take long time for reclamation. You should actually allow
the reclamation process to finish. If you feel that reclamation process is
keeping your tape drives engaged for long, then you can stop reclamation of
offsite tapes alltogather and allow the offsite tapes to become empty due
to natural expiration process.

Samiran Das




                    "Rushforth, Tim"
                    <[email protected]        To:     ADSM-L AT VM.MARIST DOT 
EDU
                    PEG.MB.CA>                  cc:
                    Sent by: "ADSM: Dist        Subject:     Re: Reclamation is 
not happening -
                    Stor Manager"               HELP!
                    <ADSM-L AT VM.MARIST DOT ED
                    U>


                    05/22/2002 01:13 AM
                    Please respond to
                    "ADSM: Dist Stor
                    Manager"





Offsite reclamation runs very slow when processing input data from disk.
(see http://msgs.adsm.org/cgi-bin/get/adsm0203/501.html)

Also with offsite reclamation, TSM will process all the eligible offsite
tapes at once (it does not process one offsite tape then the next).

Have you tried a higher value, eg how many tapes are eligible over 95%, try
this value etc.

Tim Rushforth
City of Winnipeg
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