RE: [Xen-users] VM Checkpointing anyone?

[Claris Castillo <ccastil@xxxxxxxxxx>]

Hi
I have installed Xen 3.1 on RHEL 5 and it is working pretty well, The
installation was smooth (specially when compared
to Fedora 7!)
However,  the checkponting option for "xm save" does not seem to be
available.
Is it that checkpointing is not supported yet ?The man pages don't say
anything about checkpointing neither.
Prompt help would be really appreciated. Just installing Xen took me
days...
cc

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
> Claris Castillo
> Sent: 11 June 2007 22:47
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] VM Checkpointing anyone?
>
>
> Hi,
> I am needing VM checkpointing feature running for a POC I am
> working on.
> I saw that it is in the roadmap and there are some email on
> the issue in
> teh
> devel-mailing list.  Has anyone experienced with it?
> Any link/information would be appreciated.

Checkpointing should work with the current code in 3.1 for both HVM and
PV domains. Previous versiosn should support PV domains but not HVM.

The command for this is "xm save -c domid_or_domname savefile"

To restart a checkpointed domain, you use "xm restore savefile".

I say should, as this is not something I have tested in itself. However,
I'm quite sure that it works, as checkpointing is essentially the same
as a save, except that after the data has been saved, instead of
"removing" the guest, it's "unpaused".

Have you tried it, and if so, did it work?

[Note of course that the disk-content on such a saved domain isn't
guaranteed to be consistent, so you may want to "snapshot" the diskimage
at the same time.

--
Mats

> Thanks,
> cc
>
>
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