On Wed, 10 Oct 2001, Joshua Baker-LePain wrote:

- On Wed, 10 Oct 2001 at 11:38am, Stephen Carville wrote
-
- > dumpcycle   7 days
- > runspercycle        10
- > tapecycle   12 tapes
-
- > Backups are run Monday thru Friday. I figure this setup will give me a
- > full backup every Monday. Is that right?
-
- If backups are only run Mon-Fri (5 days), and your dumpcycle is 7 days (1
- week), then your runspercycle should be 5, not 10.  Runspercycle is how
- many runs per dumpcycle, not tapecycle.

OK, I think I've got it :-)

What is important is that if any tape -- say Wednesday's tape -- is
destroyed (earthquake, fire, airplane) I can still restore the
databases files up thru Tuesday from whatever tapes are in the
archive.  The DBA tells me he can restore the entire database from the
files on the volume I am backing up as long as I can restore these
files.  Because of how the tapes are rotated, that means all I can be
sure to have is Monday's and Tuesday's tapes plus all the tapes from
last week.  If the amanda scheduler makes this possible, then I am
happy.

- > Now how do I configure amanda to do differential backups (level 1) on
- > Tuesday thru Friday?  One email I found in the archives suggested
- > setting bumpdays to 4 but wouldn't that mean level 0 for four days?
-
- You're trying to force amanda into your schedule (full Monday,
- incremental otherwise).  The way amanda expects to be run is to be given
- the parameters above, and then be left alone to set her own schedule of
- full and incrementals within those parameters.  IOW, she'll try to balance
- out the backups so that each night's are about the same size as the
- previoius nights while making sure she does (in your case) level 0 of each
- FS at least once a week.

Like I said above, it doesn't matter as long as I can be certain that
I can restore the database and systems files.

-- 
-- Stephen Carville http://www.heronforge.net/~stephen/gnupgkey.txt
==============================================================
Government is like burning witches:  After years of burning young
women failed to solve any of society's problems, the solution was to
burn more young women.
==============================================================


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