Re: btrfs subvolume diff

[Duncan <1i5t5.duncan@cox.net>]

Thomas Koch posted on Wed, 22 Apr 2015 18:08:30 +0200 as excerpted:

> for incremental backups it would be useful to know the files that
> changed between two snapshots. I found a paper about such a tool[1] that
> adds the "btrfs subvolue diff" command, but it's not yet implemented in
> btrfs-tools in Debian Jessie.
> 
> Is it in Git? Or somewhere else?
> 
> [1] https://www.kernel.org/doc/ols/2014/ols2014-pimpale.pdf

[Note that I'm just a btrfs user and list regular, not a dev, and that my 
own use-case doesn't involve subvolumes, tho I played with them a bit 
when I first got into btrfs, so my practical subvolume management 
knowledge is limited.  But based on current git's manpages...]

The closest thing in git-master, based on my build from a few days ago, 
is btrfs subvolume find-new.  That lists the recently modified files 
since <generation>, where generation is fed to the command, with a 
subvolume's current generation obtainable btrfs subvolume list using its
-g option.  (btrfs subvolume show might also list current gen, the manpage 
is vague on what information it shows, and without local subvolumes to 
test it with...)

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman