Let's keep the other amanda users informed as I might say stupid things :-)
----- Réacheminé par Cyrille Bollu/FHQ/USERS/FEDASIL le 18/08/2006 15:51 -----
Cyrille Bollu/FHQ/USERS/FEDASIL a écrit sur 18/08/2006 15:50:41 :
> Fabio Corazza <[EMAIL PROTECTED]> a écrit sur 18/08/2006 15:33:19 :
>
> > Cyrille Bollu wrote:
> > > Forget about weekly full. Amanda uses a completly different logic:
> > >
> > > Says you have 5 servers to backup and want every server to be full
> > > backuped at least once a week. Amanda will probably do something like:
> > >
> > > full backup of server 1 on monday/ other servers incremental
> > > full backup of server 2 on tuesday/ other servers incremental
> > > full backup of server 3 on wednesday/ other servers incremental
> > > full backup of server 4 on thursday/ other servers incremental
> > > full backup of server 5 on friday/ other servers incremental
> > >
> > > You don't have to tell Amanda what server has to be backuped when.
> > > Amanda will do it for you... It will simply respect your requirement of
> > > "at least every server must receive a full backup once a week"
> >
> > Ok, this sounds nice, even if I'm not going to backup an office
> > environment but a 24/7 production one. So we need to consider Saturday
> > as well as Sunday inside the backup schedule.
> >
> > > Say you need 1 cartidge per day, with your backup scenario you will need
> > > at least 2(weeks)*5(days)*1(tape_per_run)+1 = 11 tapes
> >
> > What "+1" means? Also, considering 7 weekdays this is going to be pretty
> > consuming as of cartridges numbers.
>
> > Can't I manage a better plan, say, put full dumps and incremental
> dumps into the same cartridge
>
> No. Amanda does not allow appending dumps on a same cartidge. That'sby design.
>
> > ...
>
> I think it's possible to run an Amanda configuration that only does
> incremental daily backups and another one that run only full weekly backups.
>
> Then you would only export the weekly full backups.
>
> You will probably use in that case 2(weeks)*X(tapes_per_full) +
> 7(days)*X(tapes_per_incremental). So let say 9 tapes instead of 15.
>
> What do you think?
>
> On Amanda side, it would probably not be that tricky. Probably the
> most trickiest part of the job will be to handle these 2 sets of
> tapes (weekly and daily) in your 8-tapes robot.
>
> Cyrille