Florian

Read the Manual the recycling / pruning is quite complex read Chapter 22.

Do you have any idea of the total size of the backup?

You should get sets of disc files that are related to a backup job in
chunks of 4 GB.

There is a patch to update the maximum volume jobs so that it occurs when
the volume is first used not after the job is done - it is important if
concurrent jobs are run.

I am using this concept at one site for disc backup where the critical
data is rotated on a 10 day cycle but I also have jobs that backup the
data to tape prior to the disc backup.

If you copy the Files to DVD then you will need to copy them back to disc
prior to doing any restores unless you use migration. I am using migration
at another site but having a few minor problems with Volume retention
times.

All the best
Stephen Carr





Florin Andrei wrote:
> Support wrote:
>> Florin
>>
>> Set the Pool to similar like this
>>
>> Pool {
>>   Name = Disc-Full
>>   Pool Type = Backup
>>   Storage = File
>>   Recycle = yes    Volumes
>>   AutoPrune = yes
>>   Maximum Volume Jobs = 1
>>   Maximum Volume Bytes = 4400000000 # Your requirement
>>   Volume Retention = 10 days
>>   Maximum Volumes = 30
>>   LabelFormat = Full
>> }
>
> It starts to make sense, after reading chapter 23 from the documentation
> and doing some experiments on my own.
>
> So, each volume is created only when needed, right?
>
> What happens if Maximum Volumes number has not been reached, but the
> Volume Retention for the first volume has been reached? The first volume
> will be pruned anyway, is that true?
>
> When I asked the initial question in this thread, I was having in mind
> the following metaphor: certain archiving utilities (such as RAR.exe)
> allow the creation of split archives, with the size of each chunk
> specified on the command line. The whole thing is like just one big
> archive, except it's split at certain size marks.
> I was looking to duplicate the same behavior with Bacula: let the pool
> grow and shrink just as if it was using the default parameters...
>
> Pool {
>    Name = Default
>    Pool Type = Backup
>    Recycle = yes         # Bacula can automatically recycle Volumes
>    AutoPrune = yes                     # Prune expired volumes
>    Volume Retention = 365 days         # one year
> }
>
> ...except instead of one big file have a bunch of 4400MB files, whose
> number is adjusted automatically by Bacula.
>
> If I understand it correctly, your solution is pretty close to this model.
>
> --
> Florin Andrei
>
> http://florin.myip.org/
>
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