From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul B. Henson" Subject: Re: dm-writeboost: Progress Report Date: Mon, 13 Jan 2014 13:03:11 -0800 Message-ID: <061401cf10a2$e059ed90$a10dc8b0$@acm.org> References: <52D0F25D.6030904@gmail.com> <20140113100903.GA4984@debian> <52D3D21B.8030408@gmail.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <52D3D21B.8030408@gmail.com> Content-Language: en-us List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: 'device-mapper development' List-Id: dm-devel.ids > Akira Hayakawa > Sent: Monday, January 13, 2014 3:47 AM > > This is because Writeboost makes a log on the RAM and writes it out to the > cache device in sequential manner. I don't think other cache softwares can > achieve this high level of throughput. Would I be incorrect in assuming that this increased write performance comes with the trade-off of a greater risk of losing data in the case of power failure or crash?