Dwight,
I know that this is an answer for me ... because of the 20 hours! ::)
> I can't resist... Well you are using DLT tapes !
>
Wrong, Guy's using DLT, I'm using Magstar 3570 (& ADSM 3.1.1.5)!
> 1) was a data base backup running at the same time ?
>
Well you know in 20 hours a few things may happen!
I looked at your list of suggestions, and they look perfectly sound and
reasonable to me. And in fact I checked the DB activity while reclamation
was in progress and that wasn't the problem. It happens mainly on a
STGPOOL that I dedicated to OpenMail-Store, I'll include a excerpt for
your information:
adsm> select volume_name,pct_utilized,pct_reclaim from volumes where
(pct_reclaim>=85 and stgpool_name='TAPE_MAIL')
VOLUME_NAME PCT_UTILIZED PCT_RECLAIM
------------------ ------------ -----------
1AC857 83.6 87.6
1AC857 83.6 87.6
1B1EBD 81.7 86.1
1B6D15 39.1 87.8
1E14ED 83.6 87.9
1EAB02 54.5 89.6
204BC4 57.1 87.1
adsm> q stg tape_mail f=d
Storage Pool Name: TAPE_MAIL
Storage Pool Type: Primary
Device Class Name: 3570
Estimated Capacity (MB): 522 031,9
Pct Util: 22,5
Pct Migr: 29,0
Pct Logical: 46,7
High Mig Pct: 90
Low Mig Pct: 70
Migration Processes:
Next Storage Pool:
Reclaim Storage Pool: FILE_MAIL
Maximum Size Threshold: No Limit
Access: Read/Write
Description: Storage Pool for OpenMail Systems
Overflow Location:
Cache Migrated Files?:
Collocate?: Yes
Reclamation Threshold: 100
Maximum Scratch Volumes Allowed: 100
Delay Period for Volume Reuse: 0 Day(s)
Migration in Progress?: No
Amount Migrated (MB): 0,00
Elapsed Migration Time (seconds): 0
Reclamation in Progress?: No
Volume Being Migrated/Reclaimed:
Last Update by (administrator): ADMIN
Last Update Date/Time: 13.01.1999 11:30:01
all those tapes which have both 'high reclamation' and 'high utilization'
are bound to stay in the drive for hours!
My temporary solution has been to reclaim to a FILE device class, in
order to use only one drive ... and then wait for a better version of
ADSM ... I hoped it was the 3.1.2!
My guess is that ADSM aggregates in Packets lots of "atomic" elements,
and then when it reclaims those Packets it has to do a hell of a work to
extract them. Actually, when you look at the process you see that it move
a huge quantity of data while filling up a small quantity in RECLAMATION
STGPOOOL.
Thank you for your attention
Ciao Mauro
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