From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id k11Kt3131042 for ; Wed, 1 Feb 2006 15:55:03 -0500 Received: from orca.ele.uri.edu (orca.ele.uri.edu [131.128.51.63]) by mx3.redhat.com (8.13.1/8.13.1) with ESMTP id k11KstXk023349 for ; Wed, 1 Feb 2006 15:54:55 -0500 Subject: RE: [linux-lvm] 'snapshot' target still experimental :-( From: Ming Zhang In-Reply-To: <0456A130F613AD459887FF012652963F33ED0C@mail7.amherst.edu> References: <0456A130F613AD459887FF012652963F33ED0C@mail7.amherst.edu> Date: Wed, 01 Feb 2006 15:54:36 -0500 Message-Id: <1138827276.4762.88.camel@localhost.localdomain> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Reply-To: mingz@ele.uri.edu, 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" To: LVM general discussion and development i can confirm this. iet runs well with heavy io until you create many snapshots. lvresize will be slow as well, though not hang. i think that is because the outstanding bio? not quite since i faced that several months ago. ps, not lvm related, but if u stop iet for 5 seconds. i guess iscsi ini will be unhappy? :P we can discuss in iet list. ming On Wed, 2006-02-01 at 13:39 -0500, Steffen Plotner wrote: > Hi, > > I apologize for looking up your machine. I have reported this problem > sometime ago in November of last year. > > https://www.redhat.com/archives/linux-lvm/2005-November/msg00044.html > > We currently deployed an iscsi-target (from sourceforge) server on FC4 > which functions well, until we utilize snapshots. The way I currently > remove snapshots is to stop the iscsi-target daemon for 5 seconds, to > let everything settle, then remove the snap, the restart the > iscsi-target and all is ok (of course this is not how I would like to do > things.. :). > > I have tried several patches dm and lvm in late December and they did > not help. I have specifics at my house. I will email those later on. > Thank you for responding to this issue. > > Steffen > > -----Original Message----- > From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] > On Behalf Of Alasdair G Kergon > Sent: Wednesday, February 01, 2006 1:31 PM > To: LVM general discussion and development > Subject: Re: [linux-lvm] 'snapshot' target still experimental :-( > > On Wed, Feb 01, 2006 at 01:07:20PM -0500, Steffen Plotner wrote: > > cd to a directory on an lv that has an active snapshot dd if=/dev/zero > > > of=test bs=1M count=10000 > > > And see how hard it is to remove a live active snapshot. > > Strange - I don't recall anyone reporting that problem before. > > I've just tried it here and the machine locked up:-( > > Alasdair > -- > agk@redhat.com > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/