"Craig Van Tassle" <cvantassle AT purdue DOT edu> kirjoitti viestissä
news:20111206123553.4a7046b7 AT purdue DOT edu...
>I was trying to get a bit of a better grasp of Volume Retention and
> recycling.
>
> For Tapes I understand that after the Job, File and Retention Period
> the Tape Volume is Marked as Recycled and can be reused again.
>
> For Filed. What happenes after Job, File and Retention period expire?
> Does the file get Deleted or Truncated if the Purge Action is set to
> Truncate?
>
> Also how can I figure out exactly how long a Volume will be saved.
>
> For example I want to save my Tape Volumes for a year, My
> Differentials for 6 months and my Incremental backups for 3 months.
> I've tried setting the Retention time on those Pools for the correct
> time but they don't seem to get truncated or deleted after the
> retention period.
>
Basically, File and Job Retention operate only on the Catalog to reduce the
amount of information stored about the past jobs. Volume Retention indicates
when the volume MAY be recycled, provided recycling is enabled for it. The
volume status is still shown as "full" or "used" and nothing won't happen to
the actual tape before the volume is really needed for another use (or you
put it into a shredder), the volume is still kept usable as long as
possible. So, though a tape volume had a 3 mo retention, nothing is
guaranteed to happen the day this time expires, but only after the recycling
algorithm notices it really needs to re-use that spesific tape. And if you
change the retention periods of the pool after originally labeling the
volumes, make sure you have "updated" the retention periods to the existing
volumes too (you may use llist [=long list] command to examine the retention
periods that are valid to your existing volumes)
Truncate option for file volumes should also affect to the actual file
volume when the period expires. I haven't used it (since I use tapes), it
probably works nowadays but I think it had a dangerous bug in the distant
past.
--
TiN
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