I think what Donna refers to are the terms "incremental" versus "partial". The terms somewhat specific to the backup software of your choice.
(Also not sure which is which anymore, since I use neither ability.)
Tracy Johnson
+00 1 757 766-4318 tel
+00 1 757 755-6470 mobile
Hampton, Virginia, U.S.
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> -----Original Message-----
> From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On Behalf
> Of Donna Hofmeister
> Sent: Monday, April 03, 2017 4:59 PM
> To: [log in to unmask]
> Subject: Re: [HP3000-L] partial backups
>
> On Sat, Apr 1, 2017 at 10:53 AM, Jim Ryan <[log in to unmask]> wrote:
>
> > we do full backups every night and i wanted to change to partials
> > during the week and a full on Sunday. what is the option for this? thank
> you.
> >
>
> Since everyone seems to be running in circles on answering this question....
>
> First, you need to decide what kind of partial you want to do. On Tuesday,
> do you want to backup all files changed since Sunday's full backup or do you
> want to backup all files changed since Monday's backup? (and so on....)
>
> There are some things to think about here.
>
> If your "line in the sand" is always Sunday -- then you have to deal with
> knowing that by Friday/Saturday your "partial" backup is likely going to be
> sizeable and will take longer to run. Otoh, if you ever have to do a *big*
> restore, your restore plan is plan is pretty simple -- you'll need your last
> partial and your last full backup.
>
> If your "line in the sand" is always "yesterday" -- then your "partial"
> backups will be relatively small and quick but the flip-side is your *big*
> restore could be very complicated since you'll need every partial back
> through Monday plus your full backup.
>
> Fwiw, I think most people set the backup date as "Sunday" and do partials
> from there.
>
> The technical bit that you're really asking about is:
>
> restore ....;date>=!my_lastfull
>
> "!my_lastfull" is (hopefully obviously) a CI variable that contains a date
> in "mm/dd/[yy]yy" format. This is a value that your *full backup job* needs
> to establish. So your full backup job should do something like:
>
> file lastfull,old
> echo !hpmonth/!hpday/!hpyear>*lastful
>
> Your partial job will need to do something like this:
>
> file lastfull,old
> input my_lastfull < *lastfull
>
> There's plenty of logic that needs to be added to the above examples.
> (You'll note that there is NO error checking/what-if handling, etc.) This
> should be enough to get you started.
>
> Btw, the following is the link for the latest store manual:
>
> http://www.teamnaconsulting.com/compresources/pdfs/B5151-90003.pdf
>
> - donna
>
> --
> Donna Hofmeister
> Allegro Consultants, Inc.
> 408-252-2330
> Visit us on Linkedin
> <https://www.linkedin.com/company/allegro-consultants-inc->
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