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?
On Mon 29 Jul 2019 at 14:07:25 (-0400), Stefan Monnier wrote:
> > 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 (a left over from the
> days of FAT filesystems; and even tho it became largely useless under
> NTFS it persisted because it's easier to tell people how to defragment
> than to explain to them why it's not needed any more).
>
> Do you have a concrete reason to think that defragmentation will bring
> you any tangible benefit?
Btrfs is not my thing, but I looked at the reference that was posted,
and the Gotchas referred to within, and they mention log files having
tens of thousands of extents. Doesn't sound very good.
Cheers,
David.
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