On 12/01/2015 18:31, John Snow wrote: >> How do you track which parts of the disk have been acted upon (e.g. >> mirrored in the case of the drive-mirror command), so that they have >> become 0? > > Hm... so your question here is, "What happens if the named bitmap you > are transferring gets reset to 0 during migration? Will anybody track > this change?" > > As far as I know, the only "consumer" of _named_ BdrvDirtyBitmaps is > block/backup.c, and we do not support it for mirror (yet?)
Right. > So can a block-backup job be running WHILE we migrate? I think so. Paolo
