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Posted to users@cloudstack.apache.org by Andrija Panic <an...@gmail.com> on 2014/12/08 11:50:39 UTC
KVM - VM snapshot (round 2)
Hi guys,
still wondering is there any interest into imlementing the VM snapshoot for
KVM ?
We desperately need it, so will try to contribute anyway we can (not me
obviosuly, not a developer, but my colegues will).
Can you give some guidance on this subject - I'm aware of the design
documents here
https://cwiki.apache.org/confluence/display/CLOUDSTACK/VM+Snapshots but any
more input would be very much appriciated.
I understand, that VMware/Xen natively support this, and that it might have
bigger user-base for Xen VS KVM - but this is one of the major KVM missing
features...
Any input greatly appreciated...
--
Andrija Panić
Re: KVM - VM snapshot (round 2)
Posted by Andrija Panic <an...@gmail.com>.
With KVM - I understand that there are 2 steps in general. 1) libvirts save
- which saves memory of running VM to a file 2) qemu-img to snapshot
disks...
AS for the KVM VM snapshoting - my understanding is that the code is not
implemented at all, right ?
On 8 December 2014 at 12:11, Vadim Kimlaychuk <Va...@elion.ee>
wrote:
> CS does not support memory snapshots for XenServer. Disk snapshots are
> working. Not sure about VmWare, but I guess it should be the same. I
> thought the reachest feature-set is developed for KVM. But if it does not
> support memory snapshots - I wonder wich hypervisor does it ? This option
> at user interface exists, but I didn't see it worked.
>
> Vadim.
>
>
> -----Original Message-----
> From: Andrija Panic [mailto:andrija.panic@gmail.com]
> Sent: Monday, December 08, 2014 12:51 PM
> To: dev@cloudstack.apache.org; users@cloudstack.apache.org
> Subject: KVM - VM snapshot (round 2)
>
> Hi guys,
>
> still wondering is there any interest into imlementing the VM snapshoot
> for KVM ?
>
> We desperately need it, so will try to contribute anyway we can (not me
> obviosuly, not a developer, but my colegues will).
>
> Can you give some guidance on this subject - I'm aware of the design
> documents here
> https://cwiki.apache.org/confluence/display/CLOUDSTACK/VM+Snapshots but
> any more input would be very much appriciated.
>
> I understand, that VMware/Xen natively support this, and that it might
> have bigger user-base for Xen VS KVM - but this is one of the major KVM
> missing features...
>
> Any input greatly appreciated...
>
> --
>
> Andrija Panić
>
--
Andrija Panić
Re: KVM - VM snapshot (round 2)
Posted by Nux! <nu...@li.nux.ro>.
Andrija,
No, 6.2 went fully free, no more restrictions. You can do disk and/or memory snapshots as much as you want, ACS supports it.
Lucian
--
Sent from the Delta quadrant using Borg technology!
Nux!
www.nux.ro
----- Original Message -----
> From: "Andrija Panic" <an...@gmail.com>
> To: dev@cloudstack.apache.org
> Sent: Monday, 8 December, 2014 12:05:50
> Subject: Re: KVM - VM snapshot (round 2)
> Hm... I see that in XS 6.0.2 it was impossible to do memory snapshot unless
> you had a licenced XS ? Is this still the case with XS 6.2 ?
>
> On 8 December 2014 at 12:43, Erik Weber <te...@gmail.com> wrote:
>
>> On Mon, Dec 8, 2014 at 12:11 PM, Vadim Kimlaychuk <
>> Vadim.Kimlaychuk@elion.ee
>> > wrote:
>>
>> > CS does not support memory snapshots for XenServer. Disk snapshots are
>> > working. Not sure about VmWare, but I guess it should be the same. I
>> > thought the reachest feature-set is developed for KVM. But if it does not
>> > support memory snapshots - I wonder wich hypervisor does it ? This option
>> > at user interface exists, but I didn't see it worked.
>> >
>> >
>>
>> Both XenServer and VMware supports memory-snapshot and live migration with
>> CloudStack. And is one of the main reasons we chose XenServer over KVM.
>> Now if only XenServer would get Ceph-support I'd be happy ;-)
>>
>> As for feature sets I find most hypervisors to support some good features
>> with CloudStack, but none to be perfect, ie. support all.
>>
>> On that topic, does anyone know if there's an up to date feature matrix?
>>
>> --
>> Erik
>>
>
>
>
> --
>
> Andrija Panić
Re: KVM - VM snapshot (round 2)
Posted by Erik Weber <te...@gmail.com>.
Not that I know. I take VM snaphots all the time, and don't have XS
licenses.
--
Erik
On Mon, Dec 8, 2014 at 1:05 PM, Andrija Panic <an...@gmail.com>
wrote:
> Hm... I see that in XS 6.0.2 it was impossible to do memory snapshot unless
> you had a licenced XS ? Is this still the case with XS 6.2 ?
>
> On 8 December 2014 at 12:43, Erik Weber <te...@gmail.com> wrote:
>
> > On Mon, Dec 8, 2014 at 12:11 PM, Vadim Kimlaychuk <
> > Vadim.Kimlaychuk@elion.ee
> > > wrote:
> >
> > > CS does not support memory snapshots for XenServer. Disk snapshots are
> > > working. Not sure about VmWare, but I guess it should be the same. I
> > > thought the reachest feature-set is developed for KVM. But if it does
> not
> > > support memory snapshots - I wonder wich hypervisor does it ? This
> option
> > > at user interface exists, but I didn't see it worked.
> > >
> > >
> >
> > Both XenServer and VMware supports memory-snapshot and live migration
> with
> > CloudStack. And is one of the main reasons we chose XenServer over KVM.
> > Now if only XenServer would get Ceph-support I'd be happy ;-)
> >
> > As for feature sets I find most hypervisors to support some good features
> > with CloudStack, but none to be perfect, ie. support all.
> >
> > On that topic, does anyone know if there's an up to date feature matrix?
> >
> > --
> > Erik
> >
>
>
>
> --
>
> Andrija Panić
>
Re: KVM - VM snapshot (round 2)
Posted by Andrija Panic <an...@gmail.com>.
Hm... I see that in XS 6.0.2 it was impossible to do memory snapshot unless
you had a licenced XS ? Is this still the case with XS 6.2 ?
On 8 December 2014 at 12:43, Erik Weber <te...@gmail.com> wrote:
> On Mon, Dec 8, 2014 at 12:11 PM, Vadim Kimlaychuk <
> Vadim.Kimlaychuk@elion.ee
> > wrote:
>
> > CS does not support memory snapshots for XenServer. Disk snapshots are
> > working. Not sure about VmWare, but I guess it should be the same. I
> > thought the reachest feature-set is developed for KVM. But if it does not
> > support memory snapshots - I wonder wich hypervisor does it ? This option
> > at user interface exists, but I didn't see it worked.
> >
> >
>
> Both XenServer and VMware supports memory-snapshot and live migration with
> CloudStack. And is one of the main reasons we chose XenServer over KVM.
> Now if only XenServer would get Ceph-support I'd be happy ;-)
>
> As for feature sets I find most hypervisors to support some good features
> with CloudStack, but none to be perfect, ie. support all.
>
> On that topic, does anyone know if there's an up to date feature matrix?
>
> --
> Erik
>
--
Andrija Panić
Re: KVM - VM snapshot (round 2)
Posted by Erik Weber <te...@gmail.com>.
On Mon, Dec 8, 2014 at 12:11 PM, Vadim Kimlaychuk <Vadim.Kimlaychuk@elion.ee
> wrote:
> CS does not support memory snapshots for XenServer. Disk snapshots are
> working. Not sure about VmWare, but I guess it should be the same. I
> thought the reachest feature-set is developed for KVM. But if it does not
> support memory snapshots - I wonder wich hypervisor does it ? This option
> at user interface exists, but I didn't see it worked.
>
>
Both XenServer and VMware supports memory-snapshot and live migration with
CloudStack. And is one of the main reasons we chose XenServer over KVM.
Now if only XenServer would get Ceph-support I'd be happy ;-)
As for feature sets I find most hypervisors to support some good features
with CloudStack, but none to be perfect, ie. support all.
On that topic, does anyone know if there's an up to date feature matrix?
--
Erik
Re: KVM - VM snapshot (round 2)
Posted by Andrija Panic <an...@gmail.com>.
With KVM - I understand that there are 2 steps in general. 1) libvirts save
- which saves memory of running VM to a file 2) qemu-img to snapshot
disks...
AS for the KVM VM snapshoting - my understanding is that the code is not
implemented at all, right ?
On 8 December 2014 at 12:11, Vadim Kimlaychuk <Va...@elion.ee>
wrote:
> CS does not support memory snapshots for XenServer. Disk snapshots are
> working. Not sure about VmWare, but I guess it should be the same. I
> thought the reachest feature-set is developed for KVM. But if it does not
> support memory snapshots - I wonder wich hypervisor does it ? This option
> at user interface exists, but I didn't see it worked.
>
> Vadim.
>
>
> -----Original Message-----
> From: Andrija Panic [mailto:andrija.panic@gmail.com]
> Sent: Monday, December 08, 2014 12:51 PM
> To: dev@cloudstack.apache.org; users@cloudstack.apache.org
> Subject: KVM - VM snapshot (round 2)
>
> Hi guys,
>
> still wondering is there any interest into imlementing the VM snapshoot
> for KVM ?
>
> We desperately need it, so will try to contribute anyway we can (not me
> obviosuly, not a developer, but my colegues will).
>
> Can you give some guidance on this subject - I'm aware of the design
> documents here
> https://cwiki.apache.org/confluence/display/CLOUDSTACK/VM+Snapshots but
> any more input would be very much appriciated.
>
> I understand, that VMware/Xen natively support this, and that it might
> have bigger user-base for Xen VS KVM - but this is one of the major KVM
> missing features...
>
> Any input greatly appreciated...
>
> --
>
> Andrija Panić
>
--
Andrija Panić
Re: KVM - VM snapshot (round 2)
Posted by Laszlo Hornyak <la...@gmail.com>.
It is still doing the same, I suspect that this is an intentional behavior
of qemu, it keeps the disk space for future use. However I haven't found
any documentation on how users should free the space.
On Mon, Dec 8, 2014 at 12:32 PM, Wei ZHOU <us...@gmail.com> wrote:
> As far as I know, KVM does support memory snapshot.
> The shortcoming is libvirt-java supports only internal snapshot (not
> external snapshots) for now.
> In this case, the memory snapshot will be attached to the qcow2 file, and
> the qcow2 will grow even after we remove the memory snapshot.
>
> I've changed and tested on 4.2 before, but not pushed into production.
>
> An email from the Mice, the developer of this functionality:
> http://cloudstack.markmail.org/message/c3hkpxbad6ul4mza
>
> -Wei
>
> 2014-12-08 12:11 GMT+01:00 Vadim Kimlaychuk <Va...@elion.ee>:
>
> > CS does not support memory snapshots for XenServer. Disk snapshots are
> > working. Not sure about VmWare, but I guess it should be the same. I
> > thought the reachest feature-set is developed for KVM. But if it does not
> > support memory snapshots - I wonder wich hypervisor does it ? This option
> > at user interface exists, but I didn't see it worked.
> >
> > Vadim.
> >
> >
> > -----Original Message-----
> > From: Andrija Panic [mailto:andrija.panic@gmail.com]
> > Sent: Monday, December 08, 2014 12:51 PM
> > To: dev@cloudstack.apache.org; users@cloudstack.apache.org
> > Subject: KVM - VM snapshot (round 2)
> >
> > Hi guys,
> >
> > still wondering is there any interest into imlementing the VM snapshoot
> > for KVM ?
> >
> > We desperately need it, so will try to contribute anyway we can (not me
> > obviosuly, not a developer, but my colegues will).
> >
> > Can you give some guidance on this subject - I'm aware of the design
> > documents here
> > https://cwiki.apache.org/confluence/display/CLOUDSTACK/VM+Snapshots but
> > any more input would be very much appriciated.
> >
> > I understand, that VMware/Xen natively support this, and that it might
> > have bigger user-base for Xen VS KVM - but this is one of the major KVM
> > missing features...
> >
> > Any input greatly appreciated...
> >
> > --
> >
> > Andrija Panić
> >
>
--
EOF
Re: KVM - VM snapshot (round 2)
Posted by Wei ZHOU <us...@gmail.com>.
As far as I know, KVM does support memory snapshot.
The shortcoming is libvirt-java supports only internal snapshot (not
external snapshots) for now.
In this case, the memory snapshot will be attached to the qcow2 file, and
the qcow2 will grow even after we remove the memory snapshot.
I've changed and tested on 4.2 before, but not pushed into production.
An email from the Mice, the developer of this functionality:
http://cloudstack.markmail.org/message/c3hkpxbad6ul4mza
-Wei
2014-12-08 12:11 GMT+01:00 Vadim Kimlaychuk <Va...@elion.ee>:
> CS does not support memory snapshots for XenServer. Disk snapshots are
> working. Not sure about VmWare, but I guess it should be the same. I
> thought the reachest feature-set is developed for KVM. But if it does not
> support memory snapshots - I wonder wich hypervisor does it ? This option
> at user interface exists, but I didn't see it worked.
>
> Vadim.
>
>
> -----Original Message-----
> From: Andrija Panic [mailto:andrija.panic@gmail.com]
> Sent: Monday, December 08, 2014 12:51 PM
> To: dev@cloudstack.apache.org; users@cloudstack.apache.org
> Subject: KVM - VM snapshot (round 2)
>
> Hi guys,
>
> still wondering is there any interest into imlementing the VM snapshoot
> for KVM ?
>
> We desperately need it, so will try to contribute anyway we can (not me
> obviosuly, not a developer, but my colegues will).
>
> Can you give some guidance on this subject - I'm aware of the design
> documents here
> https://cwiki.apache.org/confluence/display/CLOUDSTACK/VM+Snapshots but
> any more input would be very much appriciated.
>
> I understand, that VMware/Xen natively support this, and that it might
> have bigger user-base for Xen VS KVM - but this is one of the major KVM
> missing features...
>
> Any input greatly appreciated...
>
> --
>
> Andrija Panić
>
RE: KVM - VM snapshot (round 2)
Posted by Vadim Kimlaychuk <Va...@Elion.ee>.
CS does not support memory snapshots for XenServer. Disk snapshots are working. Not sure about VmWare, but I guess it should be the same. I thought the reachest feature-set is developed for KVM. But if it does not support memory snapshots - I wonder wich hypervisor does it ? This option at user interface exists, but I didn't see it worked.
Vadim.
-----Original Message-----
From: Andrija Panic [mailto:andrija.panic@gmail.com]
Sent: Monday, December 08, 2014 12:51 PM
To: dev@cloudstack.apache.org; users@cloudstack.apache.org
Subject: KVM - VM snapshot (round 2)
Hi guys,
still wondering is there any interest into imlementing the VM snapshoot for KVM ?
We desperately need it, so will try to contribute anyway we can (not me obviosuly, not a developer, but my colegues will).
Can you give some guidance on this subject - I'm aware of the design documents here https://cwiki.apache.org/confluence/display/CLOUDSTACK/VM+Snapshots but any more input would be very much appriciated.
I understand, that VMware/Xen natively support this, and that it might have bigger user-base for Xen VS KVM - but this is one of the major KVM missing features...
Any input greatly appreciated...
--
Andrija Panić
RE: KVM - VM snapshot (round 2)
Posted by Vadim Kimlaychuk <Va...@Elion.ee>.
CS does not support memory snapshots for XenServer. Disk snapshots are working. Not sure about VmWare, but I guess it should be the same. I thought the reachest feature-set is developed for KVM. But if it does not support memory snapshots - I wonder wich hypervisor does it ? This option at user interface exists, but I didn't see it worked.
Vadim.
-----Original Message-----
From: Andrija Panic [mailto:andrija.panic@gmail.com]
Sent: Monday, December 08, 2014 12:51 PM
To: dev@cloudstack.apache.org; users@cloudstack.apache.org
Subject: KVM - VM snapshot (round 2)
Hi guys,
still wondering is there any interest into imlementing the VM snapshoot for KVM ?
We desperately need it, so will try to contribute anyway we can (not me obviosuly, not a developer, but my colegues will).
Can you give some guidance on this subject - I'm aware of the design documents here https://cwiki.apache.org/confluence/display/CLOUDSTACK/VM+Snapshots but any more input would be very much appriciated.
I understand, that VMware/Xen natively support this, and that it might have bigger user-base for Xen VS KVM - but this is one of the major KVM missing features...
Any input greatly appreciated...
--
Andrija Panić