Re: btrfs and Guix features [was: gnu: next: Compress the executable.]

[Tobias Geerinckx-Rice]

Pierre,

Pierre Neidhardt 写道：
> Maxim Cournoyer <address@hidden> writes:
>
> > I like that Btrfs allows to set different namespaces (think of 
> > LVM
> > logical volumes) on the fly as subvolumes.  I use snapshots as 
> > a mean of
> > backups, (using the btrfs send/receive mechanism to backup the 
> > snapshots
> > (differentially) to external storage).
>
> Aren't btrfs snapshots overlapping with Guix generations?

A few ‘traditional’ distributions use btrfs snapshots to do what 
Guix does natively and much better: system roll-backs.  Reversing 
that to call btrfs's features ‘overlapping’ with Guix seems very 
forced to me :-)

Guix generations don't even protect the one valuable part: the 
human-written configuration that created it.  You need to do that 
yourself (probably with git).  Everything else is just insanely 
convenient caching.

Generations also don't allow you to btrfs send/receive, which I 
think was Maxim's main point.  If there's another KISSy way to 
back up whole Guix Systems over the Internet, I don't know of it 
(rsync can't, nor can borg or restic or…, and everything else is 
too much work :o).

Kind regards,

T G-R

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