From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Snitzer Subject: Re: About the thin provision function @ kernel 3.2 or later. Date: Mon, 16 Jan 2012 09:14:56 -0500 Message-ID: <20120116141446.GA19122@redhat.com> References: Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Yukihito HARA Cc: dm-devel@redhat.com List-Id: dm-devel.ids On Sun, Jan 15 2012 at 8:27pm -0500, Yukihito HARA wrote: > Hi, I'm Yukihito, and interested in Linux system. > > Recently days, I became happy to hear that Linux kernel start to support > thin-provisioning function. > And not trying to how it work on latest kernel. > > According to the word "thin provisioning", I'm imaging that, I can get > larger space than actual disk size. This image is born from > thin-provisioning system working on VMWare series. > And can write the files until reach to the physical maximum. Once reach to > the physical maximum, I can't write any more files to that volume, but I > can write more files after add additional physical disks to thin-pool. > > I could create the pool according to the documents included in the kernel > source(Documentation/device-mapper/thin-provisioning.txt). > But I'm not sure, it works as I expecting like above. > > So can you provide more detailed documentation about the thin-provisioning, > if you have? > There're no documentation written in Japanese, so I'll also output this > communication to wiki or my twitter in Japanese. It helpful to make your > work more major among Japanese IT engineers. And you can get more feedback > if the challengers in Japan will be increased. > The worst point of the current documentation is, it's not instruct about > how to use like above. Can't get image how to use this like VMware system > from that document. > > Sorry, this is my private testing, not for work. So I can't get much time > to this, but very interested in. Please see this reply that was recently sent to the list: http://www.redhat.com/archives/dm-devel/2012-January/msg00035.html