So, does this mean the cum incr's are truly cumulative?  ie. level 1
backups?  I had heard that this was *not* the case and it was a
misnomer.  I hope that I heard incorrectly.

I do fulls once a week (level 0) and cum incr's the rest of the week
(theoretically this means level 1).  So all the changes since the last
full backup are captured every day, no?

~JK

Anthony Soprano wrote:
> 
> Let's say you wanted fulls every 2 weeks, cum incrs every other week (in
> between fulls) , and diff on all other days:
> 
> Full - frequency = 2 weeks
> Cum Incr - frequency = 1 week
> Diff Incr - frequency = 1 day
> 
> Then set the windows for all these schedules to the same thing, say midnight
> to 9am on all days for all schedules.  On day 1 the full is the most over
> due b/c it has the longest period between schedules (2wks), then diffs incr
> will run for 6 days, then you'll get a cum incr on day 8, more diff incr for
> 6 days, then the full again on day 15. rinse and repeat.
> 
> In the above if you set fulls to once a month, you'll get every month: 1
> full, 3 cum incr and 27 diff incrs, or there abouts. .
> 
> If you want to do testing on this and other permutations, try using hours
> for frequencies (instead of days/weeks) so you can watch how it works all in
> one day.  :) Pick test files so they run quick, and disable catalog backups
> during testing so it does not affect schedule timing if catalog is actively
> getting backed up.
> 
> A.S.
> 
> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Melinda
> Orms
> Sent: Tuesday, October 23, 2001 4:39 PM
> To: Veritas Mail (E-mail)
> Subject: [Veritas-bu] Request for Scheduling Advice: windows NT clients
> 
> Hello All,
> 
> I have previously thought that a cumulative incremental backup would
> catch everything that has changed since the last successful backup.
> However a cumulative backup (using the archive bit) is basically just a
> differential that does not clear the archive bit when complete.
> 
> Does anyone have a suggestion for achieving a schedule that would
> function as follows:
> 
> full
>     <-------diff incrs
>     <-----------------cum incr
>                                   <---------diff incrs
>     <-------------------------------------------------------cum incr
> 
> ....etc
> 
> I fill approximately 215 dlt tapes/month with differentials alone.
> Restores of small directories require several tapes.  I would like to
> need only the last full , weekly, and subsequent days' tapes.
> 
> I appreciate any suggestions on how to manage this and compromises that
> other departments have made to deal with this issue.
> 
> Advance thanks,
> Melinda
> 
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> 
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu

-- 
=====================
Jeff Kennedy
Unix Administrator
AMCC
jlkennedy AT amcc DOT com