>>>>> On Sun, 17 Oct 2010 22:01:42 +0200, Sebastian Gutweiler said:
>
> Hi,
>
> I have the following situation:
>
> - A data storage server (4TB) with a growing amount of scientific data. Data
> which is already on the server will probably stay there and only
> occasionally some will be deleted.
> A backup server with 4,5TB
>
> My problem is (if I understand the documentation right):
>
> - If I perform an incremental backup into one big volume file, the space
> occupied by files deleted on the storage server won't be freed, because
> the files will be deleted from the catalog but will stay in the volume
> file. Is this right?
Yes. Bacula can't reuse space from a volume without discarding its old
contents.
> - If I use small volume files, the old volume files won't be deleted/reused
> because they will contain files which are still on the storage server.
Yes. Restore using incrementals needs to access every job since the last
full.
> - I can't do 2 Full backups and then delete the elder one, because if more
> than 2,25TB space are used on the storage server there is not enough space
> for this on the backup server.
Yes.
> Am I missing something? Is there an option/setup method to avoid these
> problems?
The usual solution is to run a Differential backup occasionally, e.g. monthly.
This will contain all files changed since the last Full backup, so you can
then recycle the volumes used for older incrementals if you don't need to get
back old deleted files.
__Martin
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