Re: Announcing btrfs-dedupe

[Adam Borowski <kilobyte@angband.pl>]

On Mon, Nov 07, 2016 at 09:48:41AM -0800, Mark Fasheh wrote:
> also on XFS with the dedupe ioctl (I believe this should be out with
> Linux-4.9).

It's already there in 4.9-rc1, although you need a special version of
xfsprogs (possibly already released, I didn't check).  It's an experimental
feature that needs to be enabled with "-m reflink=1".

Despite that experimental status, I'd strongly recommend James to test his
tool on xfs as well, as it's the second major implementation of this API[1].


Mark has already included XFS in documentation of duperemove, all that looks
amiss is btrfs-extent-same having an obsolete name.  But then, I never did
any non-superficial tests on XFS, beyond "seems to work".


Meow!

[1]. For some reasons zfs-on-linux guys didn't implement this yet, despite
it being an obvious thing on ZFS.
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