> Try borgbackup, I'm using it very successfully. It is very fast,
> supports very impressive deduplication and compression, retention
> policies, and remote backups - and it is available as a single binary
> version so you can more easily use it for disaster recovery. One
> downside: while it seems to restore nocow attributes, it seems to do it
> in a silly way (it first creates the file, then sets the attributes,
> which of course won't work for nocow). I have not checked that
> extensively, only had to restore once yet.
Wow - this looks like the holy grail I've been waiting for, not sure how
I have missed that up to now.
Especially the deduplication across several backupped systems on the backup
target
is interesting, I originally planned to do that using duperemove on the backup
target
to dedupe across the readonly snapshots.
I'll certainly give borgbackup a spin as soon as I have time to look into it!
> It's probably not worth the hassle... Wait until you are forced to
> recreate the filesystem or you are having enough spare time to do it.
> However, some settings can be changed for existing filesystems and I
> would simply ignore the fact existing meta data needs to be converted.
Thanks a lot for this hint and also your other points. I think I'll go that way,
comparing a "similar" system with skinny metadata and one without the space
usage for metadata
seems not to be different by a noticeable factor.
Since my systems are SSD only, to avoid unnecessary writes I'll then just wait
until
I really need to replay a backup.
Thanks a lot and best regards,
Oliver
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