Re: [BackupPC-users] Converting whole v3 repository to v4?
2017-03-08 10:56:45
Oh those pesky deltas!
I slept on it; it's better to make a break with the past. I'm going to tar up the old data+hardlinks and put it to cold storage.
Time is a finite resource so I'd rather move forward than get stuck in the weeds of the past.
Pavel - have you considered using tar+tape to archive your data? I deal with CPA's and lawyers so everything must be saved basically forever but it doesn't mean the data must be instantly available. Just a thought.
Cheers!
mph
On 2017-03-07 23:19, Craig Barratt wrote:
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
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