Hi Steve!
I'm not, I run my backup stgpools early in the morning, right after the
client backup window. But now, I have to wait with migration for the backup
stgpool to finish. Since we only have two 3590 drives and the total amount
of backup data produced during the night is over 1 Tb. per day, the backup
stgpool takes quite a while... Most of the time TSM finishes the backup
stgpool around 16:00 and if I start emptying the diskpool at that time, it
runs well into the night. This causes a lot of new backup data to migrate to
tape, so the backup stgpool tapepool (which I would like to be ready in
seconds) will run four hours mounting a lot of tapes.
Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines
-----Original Message-----
From: Steve Harris [mailto:Steve_Harris AT HEALTH.QLD.GOV DOT AU]
Sent: Friday, January 14, 2005 00:11
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Enabling caching to shorten housekeeping
Hi Eric,
You've probably thought of this yourself, but, there is no need to save up
all your backup stg operations until the end of the day. Since they are
"incremental" in nature, you can run the process earlier in the day with
only a short-running catchup before your migrate kicks in. Of course this
presumes that you have sufficient drives to cope with this at some point in
the day.
Regards
Steve.
Steve Harris
TSM Admin
Queensland Health,
Brisbase Australia
>>> Eric-van.Loon AT KLM DOT COM 14/01/2005 1:26:30 >>>
Hi *SM-ers!
I'm currently struggling with the fact that I cannot run a backup stgpool
diskpool and a migrate diskpool (to empty it out for the next client backup
cycle) sequentially no more. Migration would run well into the evening and I
would like it to be ready at 18:00 hours.
I'm thinking about turning on caching for my diskpool. If it works like I
hope, TSM migration empties out the diskpool, but leaving the actual data
behind, so a backup stgpool diskpool uses these cached copies, instead of
mounting all the tapes during a subsequent backup stgpool tapepool. In that
case, I can run migration and backup stgpool at the same time.
Is TSM working like this or will a cached object, once (logically) migrated,
be backed up from tape?
Thank you very much for your reply in advance!
Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines
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