On Monday 28 February 2005 09:52, ddaasd wrote:
>The idea with 3 groups sounds better.
>
>I have 2 more questions for this scenario:
>
>1. If my dumpcycle=5, runspercycle=5 then I need tapecycle to be
> minimum 6 (runspercycle+1). These are for one group  (for one week
> - only weekdays). If I would have 3 groups then it seems I need 18
> tapes. Now I have only 16. So we have to order 2 more tapes. Am I
> right?
>
Dumpcycle is in elapsed days, so if you want a weekly schedule then 
dumpcycle is either 7 days or 1 week, you can spec it either way.

runspercycle is how many times it gets run in one dumpcycle.  So for 3 
groups, you'll need 15 tapes, 16 of which you already have.

>
>2. How do I label the 5 tapes from every group? Do I label them the
> same and change them all on weekend or Monday morning?

No.  Due to holidays, people taking monday off to recover from a 
hangover, whatever, they will not long stay in synch with such a 
scheme.  Understand that amanda will not reuse a tape until tapecycle 
runs have expired, bringing the first tape back around the loop and 
elligible for re-use.  This is the mechanism that saves our butts 
when we forget to change the tape.  Make sure the holding disk has 
enough non-reserved space to accomodate say 2 backup runs, or 300% of 
a single tapes size with a reserved setting of 30%, and then they can 
be flushed, preferably one run per tape, thereby standing a small 
chance of keeping things somewhere near your personal idea of a 
schedule.

Therefore, the tapes simply need to be labeled as DailySet1-01 thru 
DailySet1-15.  Trying to make amanda fit your version of neat will 
make you feel a bit like a banty rooster encountering a full sized 
rooster.  Just set it up, and let amanda do its thing.  It does it 
quite well.

>Best regards,
>ddaas
>
>> You and Gene seem to have settled on 7,5,1, and 15 or 16 for
>> tapecycle.
>>
>> Given that, for offsite I'd suggest you consider your tapes as
>> groups of 5, i.e. 3 groups.  One group will be in use, one group
>> offsite, and the final group will be either the next group to be
>> in use or the group that was most recently in use.  The former
>> ensures you are ready to switch groups over the weekend, the
>> latter keeps some more recent backups on-site for recovery.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
99.34% setiathome rank, not too shabby for a WV hillbilly
Yahoo.com attorneys please note, additions to this message
by Gene Heskett are:
Copyright 2005 by Maurice Eugene Heskett, all rights reserved.