[lvm-devel] LVM vs. Ext4 snapshots (was: [PATCH v1 00/30] Ext4 snapshots)

[Amir G.]

On Sat, Jun 11, 2011 at 11:18 AM, Alex Bligh <alex at alex.org.uk> wrote:
>
>
> --On 11 June 2011 08:49:08 +0100 Joe Thornber <thornber at redhat.com> wrote:
>
>> I am also convinced multisnap wont be suitable for every use case.
>
> I'm surprised by one thing ext 4 snapshots doesn't seem to do: I would have
> thought the "killer feature" for doing snapshots in the fs rather than in
> the block layer would be the ability to snapshot - and more importantly
> roll back - only parts of the directory hierarchy.
>
> (I've only read the URLs Amir sent, so apologies if I've missed this)
>

No need for apologies.
There is no per-directory snapshot nor rollback with ext4 snpshots.
It is possible to configure a part of the directory hierarchy to be excluded
from future snapshots, but not to delete it selectively from past snapshots.

Amir.