[pve-devel] create snapshots
dietmar at proxmox.com
Fri Aug 31 13:33:33 CEST 2012
> if we don't save vm_state, we need to freeze the filesystem. (qemu-ga call
> xfs_freeze, which works for ext3, ext4, GFS2, XFS, and BTRFS)
> Currently, I'm using directsync or writethrough cache mode to be sure that
> the datas are always on disk.
> (I have a fast nvram journal in my nexenta box).
> I never add problem taking live disk snapshots and rollback them.
Ok, so far so good ;-)
Would it help if we split the "savevm" monitor command into
several smaller command, which we can call individually:
* this is the first part of do_savevm() till vm_stop
2.) dump_vm_state (or maybe we do this is step 1)
* write state to some fd
* simply call bdrv_snapshot_create(bs1, sn) for a single drive
* resume the VM (maybe this is a normal resume, so we can use the existing 'cont'
What do you think?
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