Well, that makes sense, I lose my consideration, thanks.
Sochin Jiang On 2016/12/19 23:31, Eric Blake wrote: > On 12/19/2016 04:38 PM, sochin jiang wrote: >> Mirroring using 'top' mode without backing file specified on the target can >> be success, >> but end with a disaster. >> >> For example: >> Migration can be success in this situation while the virtual machine on >> the destination >> is no longer usable because of backing lost. >> > > I think this is a premature policy decision. Even though the user can > abuse it to lose data, I think there is still enough technical reason > for why a user might have a valid use case for doing this (perhaps for > creating incremental backups, where the user plans on re-chaining data > back together using 'qemu-img rebase -u'), so I don't think we should > forbid it at the qemu level. >
