xm save (but don't destroy)

xm save (but don't destroy)

[Killian De Volder]

  Hello all,

I'm sure this has been asked before but I couldn't find a reference:
I desire to pauze/save the state of dom, backup/snapshot the disk and then unpauze the domain.

This can be done with xm save, but this destroy the machine, effectively doubling the required time to snapshot the machine.
(As you first have to save it to disk .... and then load it again ... With machine with a couple gigabyes of RAM this can start to take a while.)

I did see xend/XendCheckpoint.py has some code in it that decides if it will destroy or resume the machine ... This makes me thing that adding the option "leave pauzed" isn't to hard ?

Greeting and thanks in advance,
Killian

Re: xm save (but don't destroy)

[Keir Fraser]

On 12/10/2010 07:32, "Killian De Volder" <killian.de.volder@scarlet.be>
wrote:

>   Hello all,
> 
> I'm sure this has been asked before but I couldn't find a reference:
> I desire to pauze/save the state of dom, backup/snapshot the disk and then
> unpauze the domain.
> 
> This can be done with xm save, but this destroy the machine, effectively
> doubling the required time to snapshot the machine.
> (As you first have to save it to disk .... and then load it again ... With
> machine with a couple gigabyes of RAM this can start to take a while.)
> 
> I did see xend/XendCheckpoint.py has some code in it that decides if it will
> destroy or resume the machine ... This makes me thing that adding the option
> "leave pauzed" isn't to hard ?

xm save -c

 -- Keir

> Greeting and thanks in advance,
> Killian
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

Re: xm save (but don't destroy)

[Killian De Volder]

  But that won't leave the VM in pauzed state ...
As a result you cannot backup the disks ...

But I have been thinking ...
Would
     xm pauze
     backup/snapshot disk
     xen save -c
work ?

Or will this introduce unexpected problems ?

Greetings,
Killian
> On 12/10/2010 07:32, "Killian De Volder"<killian.de.volder@scarlet.be>
> wrote:
>
>>    Hello all,
>>
>> I'm sure this has been asked before but I couldn't find a reference:
>> I desire to pauze/save the state of dom, backup/snapshot the disk and then
>> unpauze the domain.
>>
>> This can be done with xm save, but this destroy the machine, effectively
>> doubling the required time to snapshot the machine.
>> (As you first have to save it to disk .... and then load it again ... With
>> machine with a couple gigabyes of RAM this can start to take a while.)
>>
>> I did see xend/XendCheckpoint.py has some code in it that decides if it will
>> destroy or resume the machine ... This makes me thing that adding the option
>> "leave pauzed" isn't to hard ?
> xm save -c
>
>   -- Keir
>
>> Greeting and thanks in advance,
>> Killian
>>
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>