Hi Steven, unfortunately I'm not able to help with most of the email, however I can tell you that the underlying operation for checkpointing is the "save" operation.
http://wiki.libvirt.org/page/VM_lifecycle regards, Jaime On Thu, Jul 24, 2014 at 4:00 PM, Steven Timm <[email protected]> wrote: > > When OpenNebula creates a checkpoint file either as part > of a onevm migrate or onevm suspend, what libvirt function > is it calling to do the checkpoint? > > We are seeing some issues on our new Ivy Bridge hardware > that sometimes in the process of a (non-live) migration, > the clock can get confused in such a way that when the > virtual machine starts from the checkpoint file > it will be hung and the kvm process uses 100% of cpu for > a day or more, and then usually resolves itself. In some > cases we see the clock jump very far into the future (2598), > which in itself can confuse a linux vm enough to hang it. > > Any clues on what OpenNebula /libvirt are doing under the covers? > Is there any reason to suspect that on Ivy Bridge hardware, > in which there are some 60 different cpu frequencies available > for cpu scaling, the rapidly fluctuating clock speeds might > get us into trouble--i.e. suspending the machine on one clock > frequency and bringig it back on a different clock frequency? > > Does anyone have experience in migrating between hardware > generations... Ivy Bridge -> Westmere and vice versa? > > Finally, has anyone run a successful combination of kernel 3.10 > or greater and RHEL6/Centos 6/Sci. Linux 6? > (In particular do the stock versions of libvirt and qemu-kvm > play nice with the 3.10 kernel)? > The 2.6.32 kernel that comes with RHEL6/Centos6/Sci Linux 6 is just not > up to dealing with virtualization on Ivy Bridge machines and it > has some trouble on Sandy Bridge too. > > Thanks > > Steve Timm > > > > ------------------------------------------------------------------ > Steven C. Timm, Ph.D (630) 840-8525 > [email protected] http://home.fnal.gov/~timm/ > Fermilab Scientific Computing Division, Scientific Computing Services Quad. > Grid and Cloud Services Dept., Associate Dept. Head for Cloud Computing > _______________________________________________ > Users mailing list > [email protected] > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > -- Jaime Melis Project Engineer OpenNebula - Flexible Enterprise Cloud Made Simple www.OpenNebula.org | [email protected]
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