From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (ext-mx13.extmail.prod.ext.phx2.redhat.com [10.5.110.18]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id q1GEgT3K010732 for ; Thu, 16 Feb 2012 09:42:29 -0500 Received: from qmta01.westchester.pa.mail.comcast.net (qmta02.westchester.pa.mail.comcast.net [76.96.62.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1GEgLfF015618 for ; Thu, 16 Feb 2012 09:42:21 -0500 Message-ID: <4F3D15CC.1080901@mohawksoft.com> Date: Thu, 16 Feb 2012 09:42:20 -0500 From: Mark Woodward MIME-Version: 1.0 References: <4F3D03AE.2050502@mohawksoft.com> <20120216135702.GA6212@redhat.com> In-Reply-To: <20120216135702.GA6212@redhat.com> Content-Transfer-Encoding: 7bit Subject: Re: [linux-lvm] Snapshots Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Mike Snitzer Cc: LVM general discussion and development On 02/16/2012 08:57 AM, Mike Snitzer wrote: > On Thu, Feb 16 2012 at 8:25am -0500, > Mark Woodward wrote: > >> I have been looking into LVM2 for a while now and while I think it >> is useful for a range of applications, its seems pretty limited in >> overall scope. >> >> Is there any active development happening? Most of the code seems >> like bug-fixes or minor tweaks. Is the snapshot system being >> improved? Specifically, snapshots of snapshots? thin provisioned >> snapshots or auto-expand (i.e. snapshots don't run out of space). >> If you look at technologies like ZFS snapshots are far better >> supported, but ZFS will probably never be real under Linux, and it >> really is far more than is really needed. >> >> So, I guess my questions are these: Is LVM in maintenance mode or is >> there active development? If it is being actively developed, is >> there a road map and is there a group or site specifically dedicated >> to the development? > Um, where are you even getting this idea that LVM2 is in maintenance > mode? Or that snapshots haven't improved? > > Sorry to come off defensive but your entire post is founded on incorrect > understanding. Understood, I apologize. > Anyway, if you look at the change history of the lvm2 repository (be it > cvs or git, cvs commits are mirrored to git) you'll see there have been > regular changes flowing in and most recently a very extensive evolution > of the code to add support for thin provisioning with highly efficient > snapshots (ala btrfs or ZFS). I guess I missed that. I need to check out the changes, looks like you have auto-grow with monitoring? I was looking more towards the "snapshots of snapshots" ability. Is that on the radar? > try: git clone git://sources.redhat.com/git/lvm2 > > take a look at the WHATS_NEW file and tell me what you think. > > Mike