Re: Debian Buster: Is it safe to use on autodefrag on a Btrfs filesystem that is used for (Restic) backup only with no Btrfs snapshots or subvolumes?

[Mart van de Wege <mvdwege@gmail.com>]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> Is it safe to use autodefrag for my use case?
>
> It sounds like it might be "safe" (the text doesn't actually say it's
> unsafe, but just that it has downsides).
>
> I do wonder why you'd want to do that, tho.  Fragmentation is typically
> something that clueless Windows users worry about

No. Fragmentation is an issue with all copy-on-write filesystems
(including ZFS, which avoids periodic defrag by keeping an enormous
amount of information in memory and doing defrag on the fly on that).

Mart

-- 
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--- AJS, quoting an uncertain source.