IMHO interaction QEMU & kernel's FREEZER (part of hibernation & cgroups) can solve many of problems. It can be done via QEMU host-2-guest sockets and scripts or embedded into virtual hardware (simulate real "suspend" behavior). Andrey Korolyov пишет: > Hello, > > I`ve thought of the same mechanism a lot ago. After couple of tests I > have concluded that coredump should be done not to Ceph directly, but > to the tmpfs catalog to decrease VM` idle timeout(explicitly for QEMU, > if other hypervisor able to work with Ceph backend and has COW-like > memory snapshotting mechanism, time of the 'flush' of the coredump > does not matter). Anyway, with QEMU relatively simple shell script > should do the thing. > > On Sat, May 18, 2013 at 4:51 PM, Jens Kristian Søgaard > <jens@xxxxxxxxxxxxxxxxxxxx> wrote: >> Hi guys, >> >> I was wondering if anyone has done some work on saving qemu VM state (RAM, >> registers, etc.) on Ceph itself? >> >> The purpose for me would be to enable easy backups of non-cooperating VMs - >> i.e. without the need to quiesce file systems, databases, etc. >> >> I'm thinking an automated process which pauses the VM, flushes the Ceph >> writeback cache (if any), snapshots the rbd image and saves the VM state on >> Ceph as well. I imagine this should only take a very short amount of time, >> and then the VM can be unpaused and continue with minimal interruption. >> >> The new Ceph export command could then be used to store that backup on a >> secondary Ceph cluster or on simple storage. >> >> -- >> Jens Kristian Søgaard, Mermaid Consulting ApS, >> jens@xxxxxxxxxxxxxxxxxxxx, >> http://www.mermaidconsulting.com/ >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > -- WBR, Dzianis Kahanovich AKA Denis Kaganovich, http://mahatma.bspu.unibel.by/ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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