Well,
If all your data is backed up under the same retention policy and all your
data has the full 8 versions, then you could make a mathmatical stab at
this,
I doubt that this is he case.
What I suggest is that you pick one client that is representative of all of
the rest
You could then try to use sql to extract info from the backups table like
file name, number of versions, backup date and then try to tie it in with
size information from the contents table.
Personally though, I would just move your representative client into a
policy domain with your new retention policy,
make a note of the space your client is using "query occupancy nodename"
run expiration, then run another query occupancy
The difference between the two query occupancies multiplied by the number
of clients should give you a reasoable estimate of the space
you will gain. Also do not forget the database saving.
Hope this hepls
John
"Stanley, Jon" <jon.stanley AT savvis DOT net>@vm.marist.edu> on 10/31/2003
03:01:30 AM
Please respond to "ADSM: Dist Stor Manager" <adsm-l AT vm.marist DOT edu>
Sent by: "ADSM: Dist Stor Manager" <adsm-l AT vm.marist DOT edu>
To: adsm-l AT vm.marist DOT edu
cc:
Subject: Space reclaimation by changing retention policy
Is there any way to quantify the amount of space that will be reclaimed
via changing a retention policy and letting expiration run until it's
done? For example, the current policy is 180 day/8 versions. If I
change that to 30 days/3 versions, how much space would I gain? I'm
sure it's quite substantial, but I need to be able to quantify it.
Thanks!
-Jon
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