Re: [Users] How can I create a snapshot for virtual disks only?
On 2012-6-27 23:30, Michal Skrivanek wrote:
That would make sense only when you are powered off, wouldn't it? Otherwise what's the point of disk snapshot with open transactions, buffers in mem, etc, without saving the state of the VM too?
I understand syncing virtual disk state with the OS cache is a quite challenge to a snapshot tool developers. However, it is a handy feature for the users just want to back up their data in the disks without stopping VM. As other virtualization solution support this feature, we should narrow the gap to attract more users to oVirt.
Thanks, michal
On 27 Jun 2012, at 17:26, Shu Ming <shuming@linux.vnet.ibm.com> wrote:
On 2012-6-27 23:19, Dafna Ron wrote:
Hi,
no. the snapshot is for the entire vm and it's disks.
On 06/27/2012 05:31 PM, Shu Ming wrote:
Hi,
I am testing oVirt engine 3.1 beta release 06-07. I tried "snapshots-->create" button for a VM and it looked like that the snapshot to be created was for both the running state of the system and the virtual disks. I am wondering if there is any way to create the snapshot only for the virtual disks of the VM in engine?
Do we have future plan to make snapshot for it's disks?
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
On 06/27/2012 08:57 PM, Shu Ming wrote:
On 2012-6-27 23:30, Michal Skrivanek wrote:
That would make sense only when you are powered off, wouldn't it? Otherwise what's the point of disk snapshot with open transactions, buffers in mem, etc, without saving the state of the VM too?
I understand syncing virtual disk state with the OS cache is a quite challenge to a snapshot tool developers. However, it is a handy feature for the users just want to back up their data in the disks without stopping VM. As other virtualization solution support this feature, we should narrow the gap to attract more users to oVirt.
actually, live snapshot today is only supported for disks, without the RAM.
Thanks, michal
On 27 Jun 2012, at 17:26, Shu Ming <shuming@linux.vnet.ibm.com> wrote:
On 2012-6-27 23:19, Dafna Ron wrote:
Hi,
no. the snapshot is for the entire vm and it's disks.
On 06/27/2012 05:31 PM, Shu Ming wrote:
Hi,
I am testing oVirt engine 3.1 beta release 06-07. I tried "snapshots-->create" button for a VM and it looked like that the snapshot to be created was for both the running state of the system and the virtual disks. I am wondering if there is any way to create the snapshot only for the virtual disks of the VM in engine?
Do we have future plan to make snapshot for it's disks?
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
On 2012-6-28 9:20, Itamar Heim wrote:
On 06/27/2012 08:57 PM, Shu Ming wrote:
On 2012-6-27 23:30, Michal Skrivanek wrote:
That would make sense only when you are powered off, wouldn't it? Otherwise what's the point of disk snapshot with open transactions, buffers in mem, etc, without saving the state of the VM too?
I understand syncing virtual disk state with the OS cache is a quite challenge to a snapshot tool developers. However, it is a handy feature for the users just want to back up their data in the disks without stopping VM. As other virtualization solution support this feature, we should narrow the gap to attract more users to oVirt.
actually, live snapshot today is only supported for disks, without the RAM. I can not find the button to create a snapshot for disk only in engine 3.1 beta release. Are you talking about a undergoing project?
Thanks, michal
On 27 Jun 2012, at 17:26, Shu Ming <shuming@linux.vnet.ibm.com> wrote:
On 2012-6-27 23:19, Dafna Ron wrote:
Hi,
no. the snapshot is for the entire vm and it's disks.
On 06/27/2012 05:31 PM, Shu Ming wrote:
Hi,
I am testing oVirt engine 3.1 beta release 06-07. I tried "snapshots-->create" button for a VM and it looked like that the snapshot to be created was for both the running state of the system and the virtual disks. I am wondering if there is any way to create the snapshot only for the virtual disks of the VM in engine?
Do we have future plan to make snapshot for it's disks?
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
On 06/27/2012 09:38 PM, Shu Ming wrote:
On 2012-6-28 9:20, Itamar Heim wrote:
On 06/27/2012 08:57 PM, Shu Ming wrote:
On 2012-6-27 23:30, Michal Skrivanek wrote:
That would make sense only when you are powered off, wouldn't it? Otherwise what's the point of disk snapshot with open transactions, buffers in mem, etc, without saving the state of the VM too?
I understand syncing virtual disk state with the OS cache is a quite challenge to a snapshot tool developers. However, it is a handy feature for the users just want to back up their data in the disks without stopping VM. As other virtualization solution support this feature, we should narrow the gap to attract more users to oVirt.
actually, live snapshot today is only supported for disks, without the RAM. I can not find the button to create a snapshot for disk only in engine 3.1 beta release. Are you talking about a undergoing project?
live snapshot is for disks only, not for RAM. so the live snapshot button only snapshots the disks already.
Thanks, michal
On 27 Jun 2012, at 17:26, Shu Ming <shuming@linux.vnet.ibm.com> wrote:
On 2012-6-27 23:19, Dafna Ron wrote:
Hi,
no. the snapshot is for the entire vm and it's disks.
On 06/27/2012 05:31 PM, Shu Ming wrote: > Hi, > > I am testing oVirt engine 3.1 beta release 06-07. I tried > "snapshots-->create" button for a VM and it looked like that the > snapshot to be created was for both the running state of the system > and the virtual disks. I am wondering if there is any way to create > the snapshot only for the virtual disks of the VM in engine? > Do we have future plan to make snapshot for it's disks?
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
On 06/28/2012 04:51 AM, Itamar Heim wrote:
On 06/27/2012 09:38 PM, Shu Ming wrote:
On 2012-6-28 9:20, Itamar Heim wrote:
On 06/27/2012 08:57 PM, Shu Ming wrote:
On 2012-6-27 23:30, Michal Skrivanek wrote:
That would make sense only when you are powered off, wouldn't it? Otherwise what's the point of disk snapshot with open transactions, buffers in mem, etc, without saving the state of the VM too?
I understand syncing virtual disk state with the OS cache is a quite challenge to a snapshot tool developers. However, it is a handy feature for the users just want to back up their data in the disks without stopping VM. As other virtualization solution support this feature, we should narrow the gap to attract more users to oVirt.
actually, live snapshot today is only supported for disks, without the RAM. I can not find the button to create a snapshot for disk only in engine 3.1 beta release. Are you talking about a undergoing project?
The is no option to save a single disk in webadmin.
live snapshot is for disks only, not for RAM. so the live snapshot button only snapshots the disks already.
Thanks, michal
On 27 Jun 2012, at 17:26, Shu Ming <shuming@linux.vnet.ibm.com> wrote:
On 2012-6-27 23:19, Dafna Ron wrote: > Hi, > > no. the snapshot is for the entire vm and it's disks. > > > On 06/27/2012 05:31 PM, Shu Ming wrote: >> Hi, >> >> I am testing oVirt engine 3.1 beta release 06-07. I tried >> "snapshots-->create" button for a VM and it looked like that the >> snapshot to be created was for both the running state of the >> system >> and the virtual disks. I am wondering if there is any way to >> create >> the snapshot only for the virtual disks of the VM in engine? >> Do we have future plan to make snapshot for it's disks?
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Thanks, Rami Vaknin, QE @ Red Hat, TLV, IL.
On 06/27/2012 09:54 PM, Rami Vaknin wrote:
On 06/28/2012 04:51 AM, Itamar Heim wrote:
On 06/27/2012 09:38 PM, Shu Ming wrote:
On 2012-6-28 9:20, Itamar Heim wrote:
On 06/27/2012 08:57 PM, Shu Ming wrote:
On 2012-6-27 23:30, Michal Skrivanek wrote:
That would make sense only when you are powered off, wouldn't it? Otherwise what's the point of disk snapshot with open transactions, buffers in mem, etc, without saving the state of the VM too?
I understand syncing virtual disk state with the OS cache is a quite challenge to a snapshot tool developers. However, it is a handy feature for the users just want to back up their data in the disks without stopping VM. As other virtualization solution support this feature, we should narrow the gap to attract more users to oVirt.
actually, live snapshot today is only supported for disks, without the RAM. I can not find the button to create a snapshot for disk only in engine 3.1 beta release. Are you talking about a undergoing project?
The is no option to save a single disk in webadmin.
live snapshot is for disks only, not for RAM. so the live snapshot button only snapshots the disks already.
there is a mix of two things here: 1. taking snapshot of a subset of the disks. 2. taking snapshot of disks + ram
Thanks, michal
On 27 Jun 2012, at 17:26, Shu Ming <shuming@linux.vnet.ibm.com> wrote:
> On 2012-6-27 23:19, Dafna Ron wrote: >> Hi, >> >> no. the snapshot is for the entire vm and it's disks. >> >> >> On 06/27/2012 05:31 PM, Shu Ming wrote: >>> Hi, >>> >>> I am testing oVirt engine 3.1 beta release 06-07. I tried >>> "snapshots-->create" button for a VM and it looked like that the >>> snapshot to be created was for both the running state of the >>> system >>> and the virtual disks. I am wondering if there is any way to >>> create >>> the snapshot only for the virtual disks of the VM in engine? >>> > Do we have future plan to make snapshot for it's disks? > > -- > Shu Ming <shuming@linux.vnet.ibm.com> > IBM China Systems and Technology Laboratory > > > _______________________________________________ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Sorry for confusion here. I attached the snapshot created. I don't think it is a standalone snapshot for disks(all eight) only. And the usage of the disk image snapshot should be bound with OS memory snapshot. The other problem is the VM must be paused when the snapshot is undergoing. On 2012-6-28 10:16, Itamar Heim wrote:
On 06/27/2012 09:54 PM, Rami Vaknin wrote:
On 06/28/2012 04:51 AM, Itamar Heim wrote:
On 06/27/2012 09:38 PM, Shu Ming wrote:
On 2012-6-28 9:20, Itamar Heim wrote:
On 06/27/2012 08:57 PM, Shu Ming wrote:
On 2012-6-27 23:30, Michal Skrivanek wrote: > That would make sense only when you are powered off, wouldn't it? > Otherwise what's the point of disk snapshot with open transactions, > buffers in mem, etc, without saving the state of the VM too?
I understand syncing virtual disk state with the OS cache is a quite challenge to a snapshot tool developers. However, it is a handy feature for the users just want to back up their data in the disks without stopping VM. As other virtualization solution support this feature, we should narrow the gap to attract more users to oVirt.
actually, live snapshot today is only supported for disks, without the RAM. I can not find the button to create a snapshot for disk only in engine 3.1 beta release. Are you talking about a undergoing project?
The is no option to save a single disk in webadmin.
live snapshot is for disks only, not for RAM. so the live snapshot button only snapshots the disks already.
there is a mix of two things here: 1. taking snapshot of a subset of the disks. 2. taking snapshot of disks + ram
> > Thanks, > michal > > On 27 Jun 2012, at 17:26, Shu Ming <shuming@linux.vnet.ibm.com> > wrote: > >> On 2012-6-27 23:19, Dafna Ron wrote: >>> Hi, >>> >>> no. the snapshot is for the entire vm and it's disks. >>> >>> >>> On 06/27/2012 05:31 PM, Shu Ming wrote: >>>> Hi, >>>> >>>> I am testing oVirt engine 3.1 beta release 06-07. I tried >>>> "snapshots-->create" button for a VM and it looked like that the >>>> snapshot to be created was for both the running state of the >>>> system >>>> and the virtual disks. I am wondering if there is any way to >>>> create >>>> the snapshot only for the virtual disks of the VM in engine? >>>> >> Do we have future plan to make snapshot for it's disks? >> >> -- >> Shu Ming <shuming@linux.vnet.ibm.com> >> IBM China Systems and Technology Laboratory >> >> >> _______________________________________________ >> Users mailing list >> Users@ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
On 06/27/2012 10:29 PM, Shu Ming wrote:
Sorry for confusion here. I attached the snapshot created. I don't think it is a standalone snapshot for disks(all eight) only. And the usage of the disk image snapshot should be bound with OS memory snapshot. The
there is currently no OS memory snapshot
other problem is the VM must be paused when the snapshot is undergoing.
On 2012-6-28 10:16, Itamar Heim wrote:
On 06/27/2012 09:54 PM, Rami Vaknin wrote:
On 06/28/2012 04:51 AM, Itamar Heim wrote:
On 06/27/2012 09:38 PM, Shu Ming wrote:
On 2012-6-28 9:20, Itamar Heim wrote:
On 06/27/2012 08:57 PM, Shu Ming wrote: > On 2012-6-27 23:30, Michal Skrivanek wrote: >> That would make sense only when you are powered off, wouldn't it? >> Otherwise what's the point of disk snapshot with open transactions, >> buffers in mem, etc, without saving the state of the VM too? > > I understand syncing virtual disk state with the OS cache is a quite > challenge to a snapshot tool developers. However, it is a handy > feature > for the users just want to back up their data in the disks without > stopping VM. As other virtualization solution support this > feature, we > should narrow the gap to attract more users to oVirt. >
actually, live snapshot today is only supported for disks, without the RAM. I can not find the button to create a snapshot for disk only in engine 3.1 beta release. Are you talking about a undergoing project?
The is no option to save a single disk in webadmin.
live snapshot is for disks only, not for RAM. so the live snapshot button only snapshots the disks already.
there is a mix of two things here: 1. taking snapshot of a subset of the disks. 2. taking snapshot of disks + ram
>> >> Thanks, >> michal >> >> On 27 Jun 2012, at 17:26, Shu Ming <shuming@linux.vnet.ibm.com> >> wrote: >> >>> On 2012-6-27 23:19, Dafna Ron wrote: >>>> Hi, >>>> >>>> no. the snapshot is for the entire vm and it's disks. >>>> >>>> >>>> On 06/27/2012 05:31 PM, Shu Ming wrote: >>>>> Hi, >>>>> >>>>> I am testing oVirt engine 3.1 beta release 06-07. I tried >>>>> "snapshots-->create" button for a VM and it looked like that the >>>>> snapshot to be created was for both the running state of the >>>>> system >>>>> and the virtual disks. I am wondering if there is any way to >>>>> create >>>>> the snapshot only for the virtual disks of the VM in engine? >>>>> >>> Do we have future plan to make snapshot for it's disks? >>> >>> -- >>> Shu Ming <shuming@linux.vnet.ibm.com> >>> IBM China Systems and Technology Laboratory >>> >>> >>> _______________________________________________ >>> Users mailing list >>> Users@ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users > >
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
On 2012-6-28 10:38, Itamar Heim wrote:
On 06/27/2012 10:29 PM, Shu Ming wrote:
Sorry for confusion here. I attached the snapshot created. I don't think it is a standalone snapshot for disks(all eight) only. And the usage of the disk image snapshot should be bound with OS memory snapshot. The
there is currently no OS memory snapshot
Enhh, interesting. So it is not live snapshot? The VM must be paused to do the snapshot in my engine. Also, I hit a bug to resume the VM after the snapshot was done. The VM was always in pause state after I clicked the resume button after the snapshot was done. I looked into the VM by VNC and VNC console showed that the VM was in frozen state. Has anyone seen these or has it been fixed in the upstream?
other problem is the VM must be paused when the snapshot is undergoing.
On 2012-6-28 10:16, Itamar Heim wrote:
On 06/27/2012 09:54 PM, Rami Vaknin wrote:
On 06/28/2012 04:51 AM, Itamar Heim wrote:
On 06/27/2012 09:38 PM, Shu Ming wrote:
On 2012-6-28 9:20, Itamar Heim wrote: > On 06/27/2012 08:57 PM, Shu Ming wrote: >> On 2012-6-27 23:30, Michal Skrivanek wrote: >>> That would make sense only when you are powered off, wouldn't it? >>> Otherwise what's the point of disk snapshot with open >>> transactions, >>> buffers in mem, etc, without saving the state of the VM too? >> >> I understand syncing virtual disk state with the OS cache is a >> quite >> challenge to a snapshot tool developers. However, it is a handy >> feature >> for the users just want to back up their data in the disks without >> stopping VM. As other virtualization solution support this >> feature, we >> should narrow the gap to attract more users to oVirt. >> > > actually, live snapshot today is only supported for disks, without > the > RAM. I can not find the button to create a snapshot for disk only in engine 3.1 beta release. Are you talking about a undergoing project?
The is no option to save a single disk in webadmin.
live snapshot is for disks only, not for RAM. so the live snapshot button only snapshots the disks already.
there is a mix of two things here: 1. taking snapshot of a subset of the disks. 2. taking snapshot of disks + ram
> >>> >>> Thanks, >>> michal >>> >>> On 27 Jun 2012, at 17:26, Shu Ming <shuming@linux.vnet.ibm.com> >>> wrote: >>> >>>> On 2012-6-27 23:19, Dafna Ron wrote: >>>>> Hi, >>>>> >>>>> no. the snapshot is for the entire vm and it's disks. >>>>> >>>>> >>>>> On 06/27/2012 05:31 PM, Shu Ming wrote: >>>>>> Hi, >>>>>> >>>>>> I am testing oVirt engine 3.1 beta release 06-07. I tried >>>>>> "snapshots-->create" button for a VM and it looked like >>>>>> that the >>>>>> snapshot to be created was for both the running state of the >>>>>> system >>>>>> and the virtual disks. I am wondering if there is any way to >>>>>> create >>>>>> the snapshot only for the virtual disks of the VM in engine? >>>>>> >>>> Do we have future plan to make snapshot for it's disks? >>>> >>>> -- >>>> Shu Ming <shuming@linux.vnet.ibm.com> >>>> IBM China Systems and Technology Laboratory >>>> >>>> >>>> _______________________________________________ >>>> Users mailing list >>>> Users@ovirt.org >>>> http://lists.ovirt.org/mailman/listinfo/users >> >> >
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory
actually=2C live snapshot today is only supported for disks=2C without=
--_3064f56a-7a6a-4abf-8891-68ba87d085f3_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable the
RAM. I can not find the button to create a snapshot for disk only in engine 3.1 beta release. Are you talking about a undergoing project? =20 live snapshot is for disks only=2C not for RAM. so the live snapshot button only snapshots the disks already. =20 How does this compare to other virtualization solutions?To me it seems like= "live snapshot" is the wrong term to use if it doesn't include the RAM sta= te. Specifically thinking of VirtualBox or VMWare Workstation... if I take = a "snapshot" of a running system the disk and RAM states are preserved in t= hat snapshot. If the VM is shut down=2C then only a snapshot of the disks i= s taken. Being that 3.1 is really close and this likely can't change (if su= ch a change were to be made)=2C can we at least have this noted somewhere i= n the documentation and/or interface that that is how "live snapshots" work= s at the current time? disk state only=2C no RAM state. If it's already the= re then I shall go to the quiet corner and RTFM. - Nick =
--_3064f56a-7a6a-4abf-8891-68ba87d085f3_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <html> <head> <style><!-- .hmmessage P { margin:0px=3B padding:0px } body.hmmessage { font-size: 10pt=3B font-family:Tahoma } --></style></head> <body class=3D'hmmessage'><div dir=3D'ltr'> >=3B >=3B>=3B actually=2C live snapshot today is only supported for d= isks=2C without the<br>>=3B >=3B>=3B RAM.<br>>=3B >=3B I can not = find the button to create a snapshot for disk only in engine<br>>=3B >= =3B 3.1 beta release. Are you talking about a undergoing project?<br>>=3B= <br>>=3B live snapshot is for disks only=2C not for RAM.<br>>=3B so th= e live snapshot button only snapshots the disks already.<br>>=3B <br><BR>= How does this compare to other virtualization solutions?<BR>To me it seems = like =3B"live snapshot" is the wrong term to use if it doesn't include = the =3BRAM state. Specifically thinking of VirtualBox or VMWare Worksta= tion... if I take a "snapshot" of a running system the disk <strong>and </s= trong>RAM states are preserved in that snapshot. If the VM is shut down=2C = then only a snapshot of the disks is taken.<BR> =3B<BR>Being that 3.1 i= s really close and this likely can't change (if such a change were to be ma= de)=2C can we at least have this noted somewhere in the documentation = =3Band/or interface =3Bthat that is how "live snapshots" works at the c= urrent time? disk state only=2C no RAM state. If it's already there then I = shall go to the quiet corner and RTFM.<BR> =3B<BR>- Nick<BR> = </div></body> </html>= --_3064f56a-7a6a-4abf-8891-68ba87d085f3_--
participants (4)
-
Itamar Heim -
Nicholas Kesick -
Rami Vaknin -
Shu Ming