Re: [BackupPC-users] Full and Incrementals Backup question

[Inno <in...@vo...>]

Great ! Thanks a lot !  (but I prefer IncrLevel = 1, 2, 3, 4 it's more logical for me for don't automatic delete backup ^^)

But just a last thing.

A IncrLevel = 1 it's not a differential backup ? Also this daily copy all modified data from the last full ? Hmm maybe because it's a "rsync" copy it's copy only the real modified data ?!

Thanks


> Message du 17/04/10 à 11h04
> De : "Luis Paulo" <lui...@gm...>
> A : in...@vo...
> Copie à : "General list for user discussion questions and support" <bac...@li...>
> Objet : Re: [BackupPC-users] Full and Incrementals Backup question
> 
> Right :)
> 
> On Sat, Apr 17, 2010 at 9:16 AM, Inno <in...@vo...> wrote:
> 
> > You disturb me ;-) !
> > I summarize to be sure I understand.
> >
> > Full : 600 GB
> > Data modify by day : 10 GB
> >
> > -------
> > IncrLevel = 1
> >
> > M | T | W | T | F | S | S | <- Day
> > I | I | I | I | F | - | - | <- Backup type
> > 1 | 1 | 1 | 1 | 0 | - | - | <- Level
> > 10| 20| 30| 40|600| - | - |  <- DATA COPY BY DAY (GB)
> >
> 
> 2nd day you have 20GB different, but 10 are already on the pool. pool grows
> only 10GB
> 3rd day you have 30GB different, but 20 are already on the pool. pool grows
> only 10GB
> ...
> You end up with 640GB
> 
> -------
> > IncrLevel = 1, 2, 3, 4
> >
> > M | T | W | T | F | S | S | <- Day
> > I | I | I | I | F | - | - | <- Backup type
> > 1 | 2 | 3 | 4 | 0 | - | - | <- Level
> > 10| 10| 10| 10|600| - | - |  <- DATA COPY BY DAY (GB)
> >
> 
> 640GB
> 
> > -------
> > With IncrLevel 1, 2, 3, 4 i'm sure that the incrlevel 3 will be not delete
> > if 2, 1 and 0 exist.
> >
> 
> It will be the other way around. 0,1,2 will not be deleted if 3 exist
> 
> 
> > With IncrLevel 1, I'm not sure about that...
> >
> 
> You may be making things more complicated that they are.
> 
> You set
> FullKeepCnt = 3
> IncrKeepCnt = 10
> 
> 3 full and 10 incremental are guarantied. There will be more if needed
> 
> You may use the exponential expiry, but the idea is the same.
> 
> -------
> > FullPeriod = 2
> > IncrPeriod = 8
> >
> 
> That means you do a full every 2 days and one Incremental every 8 days. It
> has nothing to do with keeping or deleting.
> 
> You'll want something like
> FullPeriod = 6.97   # (1 every 7 days)
> IncrPeriod = 0.97   # (1 every day)
> 
> Also I keep two weeks of backup (and I'm sure no backup will be not delete)
> >
> 
> So you want
> FullKeepCnt = 3    # (thats two weeks divided by FullPeriod=6.97 and 1
> extra. It could be 2)
> IncrKeepCnt = 15  # (15 days)
> 
> That's the basic. Can't be messed with other confs. I do believe that,
> backuppc is well done :)
> 
> 
> > -------
> > -------
> > -------
> > Thanks a lot :-)
> >
> > > Message du 17/04/10 à 08h50
> > > De : "Luis Paulo" <lui...@gm...>
> > > A : in...@vo...
> > > Copie à : "General list for user discussion questions and support" <
> > bac...@li...>
> > > Objet : Re: [BackupPC-users] Full and Incrementals Backup question
> > >
> > > Inno,
> > > If files are all different, and you modify 10GB every day keeping the 600
> > > total, I think (pretty sure) that yes, on the 4th you'll have the
> > original
> > > 600GB plus the 40GB differences.
> > > That with incrementals.
> > >
> > > With fulls every day, you'll have just 600GB every day, total on the pool
> > > (we are not minding about compression), after the cleanup.
> > >
> > > (Really hope Les don't mind me saying what he said with other words. I'm
> > > taking the chance to think loud with Inno.)
> > >
> > > But fulls are slower, even with rsync. That also means that with tar or
> > > samba are even slower. You know why?
> > > I'm going to go through http://www.samba.org/rsync/documentation.html.
> > > Something scared me first time, and I didn't return.
> > >
> > > Thanks, Les
> > >
> > > Regards
> > > Luis
> > >
> > > On Fri, Apr 16, 2010 at 9:45 PM, Inno <in...@vo...> wrote:
> > >
> > > > But if I have many data : 600 GB for a full and 10 GB modify by day. An
> > > > incremental it's better ? Because if I have a differential backup I
> > have 10
> > > > GB the first day, 20 GB the second day... 40 GB the fourth day... ...
> > no ?
> > > >
> > > > M T W T F S S <- Day
> > > > I I I I F - - <- Backup
> > > > 1 2 3 4 0 - - <- Level
> > > > 10 20 30 40 600 <- GB
> > > >
> > > >
> > >
> >
> > ____________________________________________________
> >
> >  Nouveau ! Partagez vos envies et découvrez les bons plans voyages des
> > internautes sur http://forums.voila.fr/
> >
> >
> >
> >
> 

____________________________________________________

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