[pve-devel] savevm tests
aderumier at odiso.com
Wed Aug 29 15:36:28 CEST 2012
it seem that vmstate is not saved in the snapshot. (I also dind't notice any vm hang during snapshot)
starting kvm with -loadvm snapshotname give
kvm: Error -22 while loading VM state
So this is why it was hanging with using loadvm monitor command.
----- Mail original -----
De: "Alexandre DERUMIER" <aderumier at odiso.com>
À: pve-devel at pve.proxmox.com
Envoyé: Mercredi 29 Août 2012 14:34:30
Objet: [pve-devel] savevm tests
Hi have done some savevm tests:
lvm + qcow2
It doesn't work :(
savevm can take the snapshot, but when trying to rollback, it doesn't work.
also you can have a lvm disk of 10GB, format with qcow2 with 5GB, the guest see 10GB.
savevm works fine
loadvm works fine,rollback in live.
qemu-img snapshot rollback offline works
loadvm works (rollback in done), but vm hang, and we need to restart it .
rbd rollback offline works
savevm : hang,snapshot not take
loadvm: don't have try
sheedog rollback command is not already implement (soon, see sheepdog mailing)
savevm works with mutiples disk, and can mix differents storage, they just need to support savevm command.
If you have a qcow2 + raw, it thrown an error and don't make the snapshot.
note :I don't know how it's works in you don't have the snapshot on all the disks.
exemple : add a disk, take a snap1, add a second disk, take a snap2, now rollback to snap1 ?
I have also try with the patch to disable memory saving, I didn't have had any problems.
Maybe it could be usefull to add an option to not save memory ?
Also maybe can we add support for qemu guest agent, to freeze filesystem in this case.
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