Re: BTRFS messes up snapshot LV with origin

[Phillip Susi <psusi@ubuntu.com>]

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On 11/18/2014 9:54 PM, Chris Murphy wrote:
> Why is it silly? Btrfs on a thin volume has practical use case
> aside from just being thinly provisioned, its snapshots are block
> device based, not merely that of an fs tree.

Umm... because one of the big selling points of btrfs is that it is in
a much better position to make snapshots being aware of the fs tree
rather than doing it in the block layer.

So it is kind of silly in the first place to be using lvm snapshots
under btrfs, but it is is doubly silly to use lvm for snapshots, and
btrfs for the mirroring rather than lvm.  Pick one layer and use it
for both functions.  Even if that is lvm, then it should also be
handling the mirroring.

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