I have a new client with a  requirement to keep monthly point in time copies for
6 months.
The question is whether backupsets or archives are the best mechanism.
I am at TSM 4.2.2 os390
In my situation I have access to os390 dfhsm which means that I can generate
backupsets to disk
and then use os390 dfhsm to migrate to tape and also to provide a copy of the
tape to protect against media failure.  So this means I do not have to archive
to achieve media protection.
Also backupsets are a very small database overhead and you do not have to
retransmit the files over the network.
Against this backup sets only work at filespace level, but in this instance only
very small amount of data on filespace  does not require the 6 month retention.
Also individual files are easier to recover from archives, but how often do need
to do this?
So are backupsets a no brainer here?
I am interested in the recommendations of people who use both in a production
environment.
Thanks
John








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