On Thu, 08 Mar 2001 17:18:37 -0500 "John R. Jackson"
<[EMAIL PROTECTED]> wrote:
> >In other backup systems I've used, I have always kept certain level 0's
> >out of the rotation so's that I could alway go back quite a bit if
> >necessary.
>
> That's harder to do with Amanda because when a level 0 is done is not
> deterministic (well, it is, but it's much more complicated than "it's
> Thursday").
>
> >Can I add as many new ones as I want then? ...
>
> Yup.
>
> >And yet there are over 100 tapes in the tapelist file!
>
> That just means the tapecycle value didn't get updated when more tapes
> were added. If tapelist has less entries than tapecycle, Amanda will
> ask for new tapes. But if it has more, Amanda just cycles through them
> and pays no attention to tapecycle.
>
> Tapecycle is used for some other things (how long to keep some log files).
>
> >Do these figures mean that a level 0 must be done on each file system
> >at least once every 4 weeks?
>
> Yes. But notice what you said. "At least", not "Every". In other words,
> it might only be a couple of days between doing level 0's or it might be
> the full four weeks. It's all up to how Amanda wants to balance the load.
one last question (promise) and this is what I've been trying to figure
out all along, is how does amanda figure out what to dump and when to
dump? I mean what is the algorithm? I haven't been able to figure this
out and yet it must be documented somewhere.
Thanks again,
Ross
>
> >And I guess if all the tapes are being reused then these backups are
> >just for emergencies and if you wanted to look at something from say 3
> >years ago, you couldn't.
>
> Correct, without taking other action to save that data.
>
> >Ross
>
> John R. Jackson, Technical Software Specialist, [EMAIL PROTECTED]
--
Ross Macintyre
Heriot-Watt University
[EMAIL PROTECTED]
