Hi Chenzongliang, I still don't understand what is difference between proposed feature and 'restore volume from snapshot'? Could you please explain it?
Regards, Ivan Kolodyazhny, http://blog.e0ne.info/ On Thu, Apr 7, 2016 at 12:00 PM, Chenzongliang <chenzongli...@huawei.com> wrote: > Dear Cruz: > > > > Thanks for you kind support, I will review the previous spec > according to the following links. May be more user scenario we should > considered,such as backup,create volume from snapshot,consistency group and > etc,we will spend some time to gather > > the user's scenarios and determin what to do next step. > > > > Sincerely, > > zongliang chen > > > > *发件人:* Erlon Cruz [mailto:sombra...@gmail.com] > *发送时间:* 2016年4月5日 2:50 > *收件人:* OpenStack Development Mailing List (not for usage questions) > *抄送:* Zhangli (ISSP); Shenhong (C) > *主题:* Re: [openstack-dev] [Cinder] About snapshot Rollback? > > > > Hi Chen, > > > > Not sure if I got you right but I brought this topic in #openstack-cinder > some days ago. The idea is to be able to rollback a snapshot in Cinder. > Today what is possible to do is to create a volume from a snapshot. From > the user point of view, this is not ideal, as there are several cases, if > not the majority of, that the purpose of the snapshot is to revert to a > desired state, and not keep the original volume. For some backends, keeping > the original volume means space consumption. This space problem becomes > bold when we think about consistency groups. For consistency groups, some > backends might have to copy an entire filesystem for each snapshot, > consuming space and time. So, I think it would be desired to have the > ability to revert snapshots. > > > > I know there have been efforts in the past[1] to implement that, but for > some reason the work was stopped. If you want to retake the effort please > create a spec[2] sol everybody can provide feedback. > > > > Erlon > > > > > > [1] > https://blueprints.launchpad.net/cinder/+spec/cinder-volume-rollback-snapshot > > [2] https://github.com/openstack/cinder-specs > > > > On Thu, Mar 24, 2016 at 6:09 AM, Chenzongliang <chenzongli...@huawei.com> > wrote: > > Hi all: > > We are condering add a fucntion rollback_snapshot when we use backup. > In the end user's scenario. If a vm fails, we hope that we can use snapshot > to to recovery the volume's data. > > Beacuse it can quickly recovery our vm. But if we use the remote data > to recovery. We will spend more time. > > But i'm not sure if the data was recoveried from the backend. whether > the host need to rescan the volumes? At the same time. If a volume have > been extended, whether it can be roolback? > > > > I want to know whether the topic have been discussed or have other > recommendations to us? > > > > Thanks > > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > >
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