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(a)linux.vnet.ibm.com&gt; 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(a)linux.vnet.ibm.com&gt; >>> IBM China Systems and Technology Laboratory >>> >>> >>> _______________________________________________ >>> Users mailing list >>> Users(a)ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users > >

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(a)linux.vnet.ibm.com&gt; >>>> 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(a)linux.vnet.ibm.com&gt; >>>>> IBM China Systems and Technology Laboratory >>>>> >>>>> >>>>> _______________________________________________ >>>>> Users mailing list >>>>> Users(a)ovirt.org >>>>> http://lists.ovirt.org/mailman/listinfo/users >>> >>> >> > > _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users

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(a)linux.vnet.ibm.com&gt; >>>>>> 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(a)linux.vnet.ibm.com&gt; >>>>>>> IBM China Systems and Technology Laboratory >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Users mailing list >>>>>>> Users(a)ovirt.org >>>>>>> http://lists.ovirt.org/mailman/listinfo/users >>>>> >>>>> >>>> >>> >>> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users > >

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(a)linux.vnet.ibm.com&gt; >>>>>>>> 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(a)linux.vnet.ibm.com&gt; >>>>>>>>> IBM China Systems and Technology Laboratory >>>>>>>>> >>>>>>>>> >>>>>>>>> _______________________________________________ >>>>>>>>> Users mailing list >>>>>>>>> Users(a)ovirt.org >>>>>>>>> http://lists.ovirt.org/mailman/listinfo/users >>>>>>> >>>>>>> >>>>>> >>>>> >>>>> >>>> _______________________________________________ >>>> Users mailing list >>>> Users(a)ovirt.org >>>> http://lists.ovirt.org/mailman/listinfo/users >>> >>> >> > >