There are two options to implement this:
- truly convert v3 backups to v4 format. This is quite complex since
forward deltas (ie, incrementals) would have to be converted into reverse
deltas; there are lots of cases to consider and testing them all would take
a lot of time. The effort and risk (of messing up an old backup) doesn't
seem worth it.
- hybrid - convert just the backup storage from V3 to V4, but keep the
V3 logical dependency (ie: replace the V3 attrib file + hardlinks in each
directory with just a V4 attrib file). This is a good bit easier and lower
risk, as each directory can be updated in a self-contained manner. The
testing would need to ensure that V3 viewing / restore etc works with this
hybrid storage.
If there is enough interest I would consider implementing the hybrid
approach. But I'm working on rsync-bpc-3.1.2 right now.
Craig
On Tue, Mar 7, 2017 at 6:41 PM, Michael Huntley <mich...@huntley.net> wrote:
> Hi Craig -
>
> among the billion other things to do in life - is this reasonably
> possible? I looked at the perl and came to the considered conclusion, I'm
> just not a perl guy. However, it would be great to convert older backups
> to v4 - that would reduce my workload on BTRFS snapshops, etc. No
> hardlinks makes moving large sums of data so much easier......
>
>
> 2cents.....
>
> mph
>
> On 2017-03-06 01:58, Pavel Hofman wrote:
>
> Hello,
>
> please is it possible somehow to script the BackupPC_backupDuplicate
> tool to be able to convert not only the last v3 backup to v4, but also
> all previous backups? I would run the script in the background.
>
> The intention is migrating from XFS to ZFS for server consolidation and
> I am afraid I need to get rid of the hardlinks in the 10 yrs of
> historical backups.
>
> I have read about running an arbitrary filesystem over ZFS block device,
> but I am afraid of poor performance.
>
> Thanks a lot.
>
> Best regards,
>
> Pavel.
>
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> _______________________________________________
> BackupPC-users mailing list
> BackupPC-users@lists.sourceforge.net
> List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
> Wiki: http://backuppc.wiki.sourceforge.net
> Project: http://backuppc.sourceforge.net/
>
>
> ------------------------------------------------------------
> ------------------
> Announcing the Oxford Dictionaries API! The API offers world-renowned
> dictionary content that is easy and intuitive to access. Sign up for an
> account today to start using our lexical data to power your apps and
> projects. Get started today and enter our developer competition.
> http://sdm.link/oxford
> _______________________________________________
> BackupPC-users mailing list
> BackupPC-users@lists.sourceforge.net
> List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
> Wiki: http://backuppc.wiki.sourceforge.net
> Project: http://backuppc.sourceforge.net/
>
>
------------------------------------------------------------------------------
Announcing the Oxford Dictionaries API! The API offers world-renowned
dictionary content that is easy and intuitive to access. Sign up for an
account today to start using our lexical data to power your apps and
projects. Get started today and enter our developer competition.
http://sdm.link/oxford
_______________________________________________
BackupPC-users mailing list
BackupPC-users@lists.sourceforge.net
List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki: http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/
