[Users] How can I create a snapshot for virtual disks only?

[Shu Ming]

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 at 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 at linux.vnet.ibm.com>
>>>>>>>>>> IBM China Systems and Technology Laboratory
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> Users mailing list
>>>>>>>>>> Users at ovirt.org
>>>>>>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>> _______________________________________________
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>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>
>>>>
>>>
>>
>>
>


-- 
Shu Ming <shuming at linux.vnet.ibm.com>
IBM China Systems and Technology Laboratory