Re: deduplicating file systems: VDO with Debian?
On Wed, 2022-11-09 at 09:46 +0100, tomas@tuxteam.de wrote:
> On Wed, Nov 09, 2022 at 09:39:45AM +0100, hw wrote:
>
> [...]
>
> > When you keep N full generations of backups it's different. Using rsync,
> > you'll
> > only write the changes anyway, switching between the generations. Most of
> > the
> > data is being stored N times.
>
> Pehaps you don't know about rsync's --link-dest option: you can, with rsync,
> keep generations without duplicating between them.
No, I didn't know that. My intention has always been to create N copies. I'm
trying to figure out if I should change that.
> But, as others have said, deduplication at the file system level (or below,
> as VDO does) is mainly interesting where you have a whole herd of VMs or
> containers which are constantly being cloned and too few sysadmins. That's
> where those solutions shine (i.e. dedup across "space", not "time").
Well, I'm undecided about that when it comes to backups ... Why I would clone
VMs or containers all the time?
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