* [Qemu-devel] Online image backup
@ 2007-11-20 11:23 Matteo Bertini
2007-11-20 23:02 ` Fabrice Bellard
0 siblings, 1 reply; 3+ messages in thread
From: Matteo Bertini @ 2007-11-20 11:23 UTC (permalink / raw)
To: qemu-devel
Hello everyone,
is there any support for an online image backup? Or some direction to
have it?
Imagine I have an emulated server. How can I make an online backup of
the server state?
If I'm right in the actual design this is very hard.
Or there are some image internals update rules that permit a consistent
copy possible?
Regards,
Matteo Bertini
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] Online image backup
2007-11-20 11:23 [Qemu-devel] Online image backup Matteo Bertini
@ 2007-11-20 23:02 ` Fabrice Bellard
2007-11-22 10:38 ` [Qemu-devel] " Matteo Bertini
0 siblings, 1 reply; 3+ messages in thread
From: Fabrice Bellard @ 2007-11-20 23:02 UTC (permalink / raw)
To: qemu-devel
Matteo Bertini wrote:
> Hello everyone,
>
> is there any support for an online image backup? Or some direction to
> have it?
>
> Imagine I have an emulated server. How can I make an online backup of
> the server state?
>
> If I'm right in the actual design this is very hard.
>
> Or there are some image internals update rules that permit a consistent
> copy possible?
It should not be difficult provided the VM is using the QEMU qcow2 image
format (doing a backup can be seen as a kind of snapshot).
Fabrice.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Qemu-devel] Re: Online image backup
2007-11-20 23:02 ` Fabrice Bellard
@ 2007-11-22 10:38 ` Matteo Bertini
0 siblings, 0 replies; 3+ messages in thread
From: Matteo Bertini @ 2007-11-22 10:38 UTC (permalink / raw)
To: qemu-devel
Il 21-11-2007 0:02, Fabrice Bellard ha scritto:
> Matteo Bertini wrote:
>> Hello everyone,
>>
>> is there any support for an online image backup? Or some direction to
>> have it?
>>
>> Imagine I have an emulated server. How can I make an online backup of
>> the server state?
>>
>> If I'm right in the actual design this is very hard.
>>
>> Or there are some image internals update rules that permit a consistent
>> copy possible?
>
> It should not be difficult provided the VM is using the QEMU qcow2 image
> format (doing a backup can be seen as a kind of snapshot).
>
I have tested that is quite hard to corrupt an image, even copying
during a savevm, at least the last completely saved one is loadvm-able.
And that is good, but I didn't really undestand what appends at
filesystem level...
Am I somewhat granted that after a savevm and a copy (online) the image
is loadvm-able and the filesystem is back to the last saved state?
Thank you,
Matteo Bertini
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2007-11-22 10:41 UTC | newest]
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2007-11-20 11:23 [Qemu-devel] Online image backup Matteo Bertini
2007-11-20 23:02 ` Fabrice Bellard
2007-11-22 10:38 ` [Qemu-devel] " Matteo Bertini
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