From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Phillips Subject: Re: [PATCH RFC] dm snapshot: shared exception store Date: Tue, 12 Aug 2008 12:07:24 -0700 Message-ID: <200808121207.25140.phillips@phunq.net> References: <20080804171242V.fujita.tomonori@lab.ntt.co.jp> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20080804171242V.fujita.tomonori@lab.ntt.co.jp> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: dm-devel@redhat.com Cc: agk@redhat.com List-Id: dm-devel.ids On Monday 04 August 2008 01:22, FUJITA Tomonori wrote: > Note that the code is still in a very early stage. There are lots of > TODO items: > > ... > > - applying a delta to in a atomic manner This is not necessary because of the way the ddsnap replication algorithm works. A delta is always written to the downstream origin, and nothing else accesses the downstream origin while that is taking place. Regards, Daniel