But...

Every 28 days does not fall on a weekend.  If you have a window for Sat-Sun F28 
backups, and Monday is the 28th day, then it waits a week.  You may, or may not 
care about this.

The problem we found with adding a monthly schedule to a weekend that has a 
full schedule is that the next incremental is take off the last full... if you 
do the monthly after the full and then offsite the monthly tapes, then if you 
need to restore, you should start with the last full.  And doing the monthly 
first might mean that you then have too little time to do a full after that.  
Also, two schedules means double the image database entries for that weekend.

If you have a schedule every 7 days for the full and the full fails on Friday 
and you manually rerun it on Saturday, then it won't be attempted the next 
Friday because 7 days have not passed.  We have our fulls set up to run every 5 
days, but the window is Fri 18:30 for 24 hours and again Sat 18:30 for 24 
hours.  That way if a backup fails each time it is tried (three tries in 12 
hours) Friday night, it is reattempt Sat night.  And, because we have the 
schedule set for every 5 days, it is scheduled as usual for fulls the next 
Friday night.

Our method is to recalculate the expiration date of all full backups that run 
over the first weekend of the month.  We may add duplication in there, but 
we'll see...

Kelly


--

Kelly Wyatt, Kelly.Wyatt AT SAS DOT com
Senior Systems Programmer
Strategic Recovery
SAS Institute Inc. / SAS Campus Drive / Cary, NC  27513
http://www.sas.com
SAS... The Power to Know




-----Original Message-----
From: David A. Chapa [mailto:david AT datastaff DOT com]
Sent: Tuesday, June 27, 2000 10:23 AM
To: Terese Pelletier
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Monthly backups for offsite storage


Quoting Terese Pelletier <terese.pelletier AT kodak DOT com>:

> All,
>
> We are trying to develop a schedule for monthly 
(full) backups to send
> to offsite storage.  We would like to maintain our 
current schedule
> scheme of Mon-Thur incrementals and Fri fulls and add 
a monthly
> schedule.  Since there doesn't seem to be the monthly 
selection under
> frequency this is not as straight forward as we had 
hoped.
>
> We are concerned that the weekly Fri full backup will 
not allow a 4 week
> rotation to run.  We would really like something 
close to the first/last
> weekend of the month so that they can be labeled by 
month similar to our
> other backup schemes that are offsite.
>
> Any suggestions?
> Thanks,
> Terese
> --
> Terese Pelletier               |Internet: 
terese.pelletier AT kodak DOT com
> Eastman Kodak Company          |Phone: 716-477-1316
> Room 6235, Bldg 69, KRL        |Pager: 716-253-7239
> Rochester, NY 14650-1925       |Fax:   716-477-0127
> _______________________________________________
> Veritas-bu maillist  -  Veritas-
bu AT mailman.eng.auburn DOT edu
> 
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-
bu
> 
The schedules work based on a heirarchy...let me try to 
illustrate.  
M     T     W     Th    F
I1    I1    I1    I1    F7
I1    I1    I1    I1    F7
I1    I1    I1    I1    F7
I1    I1    I1    I1    F28
I1    I1    I1    I1    F7

What I am trying to display here are your incrementals 
running daily M-Th, with your Weekly Fulls on Friday 
(every seven days). Each time the NetBackup 
scheduler 'wakes up' to see what there is to do, it 
looks at the schedules, the frequencies and the length 
of time between the last backup of that particular 
schedule.  So if you have a Full Schedule that has a 
frequency of 28 days (F28-monthly), NetBackup will give 
that a higher priority than the F7 (full every seven 
days) when they happen to fall on the same backup day.  
NetBackup determines that it has seen this F7 schedule 
seven days ago, but it hasn't seen this F28 in over 28 
days, it will launch the backup with the F28 schedule.

make sense?

-David Chapa

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
David A. Chapa                847 413 1144 p
Director of Technology        847 413 1168 f
DataStaff, Inc.               http://www.datastaff.com
nbu-lserv AT datastaff DOT com       majordomo AT datastaff DOT com
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