Re: [Bacula-users] Backup to tape with free and own tape management

[Benjamin E. Z. <ze...@ib...>]

On Friday 30 March 2007 22:28, Arno Lehmann wrote:
> Hi,
>
> On 3/30/2007 5:03 PM, Benjamin E. Zeller wrote:
> > 1 baender pro tag, insg 10 baender
> > sicherungsverf. mo-fr die ersten 15 ( 3 pro tag) nix am we,
> > woche drauf baender 16-30
> > woche drauf
>
> Thanks for your working notes :-)

You are welcome ;-)

>
> > Hi list,
> >
> > it's me again :-9
> >
> > Got a new scenario, on which I need some advice and help, whetehr it is
> > possible to solve that requirements with bacula.
> > I'll try to clarify the circumstances by bringing up an example.
> >
> > The "exercise" is the following:
> >
> > From monday to friday, a fullbackup should be written to tape - no
> > backups on saturday and sunday.
>
> No problem.

This is where I'm sure.

>
> > Let's say, one's got 10 tapes overall. Week 1 uses tape 1-5, week 2 uses
> > tape 6-10, week 3 1-5 again and so on.
>
> You can set something like this up, but I don't like it.

I don't either, but it's a request.

>
> > The question is: is it to handle, that bacula does not reuse the labell=
ed
> > tape 1 on monday of week 3, but really erases it, labels it with the
> > current date and does his backup job.
>
> Oh oh... using some scripting, this is possible, but I would strongly
> recommend against it. Baculas volume management is good enough to not
> need that sort of games.

That's what I'm thinking too.

>
> Also, think what happens when you use an autochanger with barcode
> reader: You'd have to stick new labels to your cartridges every time you
> want it relabeled...
>
> > Or to say "OK, today, I want to take a tape offsite
> > and replace it with a new tape from my vendor, which was never used
> > before". So bacula needs to be told, to e.g. on 3rd monday tape no. 1,
> > but not to append but relabel it with the current date OR use a new tap=
e.
>
> Also possible with heavy scripting, I think.

So do I.

>
> > This example can be spread up up to 4 weeks cycle with 40 tapes etc.
> >
> > I hope I was able to state my question if not, please ask :-)
>
> I sense a fundamental difference of philosophy... for you, the tape
> label is some kind of a name indicating the tape's contents.
>
> For me, the tape label is a unique identifier for a single tape, which
> will never change during that tapes lifetime, and which will never be
> reused.

Well, as a matter of fact, I won't state the phisolophy-stuff as it is mine=
=20
too. A customer wants to work lite stated above, which doesn't mean, that I=
=20
appreciate this planning.

>
> Of course I think I am right :-)
>
> If you really want to have changing tape labels and automatic
> relabeling, you will need some complex scripts to achieve that with Bacul=
a.

That was my feeling too. I'd not like to do that stuff with Bacula, as it=20
would simply annul some of the major and best features of bacula and strip =
it=20
down in some kind of way, which I don't really like and what isn't what I=20
want to do.

>
> Arno

Benni

>
> > Greetings,
> >
> > Benni
> >
> >
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=2D-=20
Benjamin E. Zeller
Ing.-B=FCro Hohmann
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D-82515 Wolfratshausen

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