Re: [dm-devel] [PATCH] dm-thinp: new device mapper target to thin provision storage

[Phillip Susi <psusi cfl rr com>]

On 9/29/2010 7:25 AM, Heinz Mauelshagen wrote:
> On Tue, 2010-09-28 at 17:44 -0400, Phillip Susi wrote:
>> How is this different than snapshotting a zero target?
> 
> Like Hanness mentioned: you can free space.

Could you clarify that a bit?  Is space only freed if you reduce the
length of a device?  You can't do the same with a snapshot?