Where would you draw the line with this? For monthly snapshots, you're
saying it works better than archives/backupsets. Would you also extend
this to replacing yearly archives that need to be around 7 years? I
don't see why not, but I've not spent as much time mulling it over as
you probably have.
>>> asr AT UFL DOT EDU 8/15/2006 12:26 PM >>>
>> On Tue, 15 Aug 2006 11:04:11 -0500, Dave Mussulman
<mussulma AT uiuc DOT edu> said:
> Any opinion on archives vs. backupsets for a monthly snapshot kept
for 6
> months?
Yes; E) None of the above.
If you want a monthly snapshot, define a new devclass, with different
retention parameters; perhaps:
verexists: 8
verdeleted: 8
retextra: 300
retonly: 300
This is slightly paranoid, with a little extra in each category.
Then define a FOO-MONTHLY node as an echo of each node FOO in your
normal management class. Run the incrs for the -MONTHLY nodes, ....
monthly. ;)
You'll accumulate 8 versions with these settings, and since you're
only cutting new versions (at a maximum) monthly, you'll have 8
months.
I used 8 instead of 6 Just In Case someone runs an incr out of school,
so you don't the oldest version off the end of the queue.
For a more detailed level of "snapshot", you could set FREQUENCY=30,
and run incrementals against the -MONTHLY nodes every day.
This way you still keep 95% of the advantages of incremental-forever
processing, and still leverage the TSM database.
Resort to backupsets if your needs include restore operations
independant of a running TSM server, or independant of good network.
- Allen S. Rout
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