This series adds support for live migration without shared storage,
means
copy the storage while migrating. It was tested with KVM. Supports 2
ways
to replicate the storage during migration:
1. Complete copy of storage to destination
2. Assuming the storage is cow based, copy only the allocated
data, time of the migration will be linear with the amount of
allocated
data (user responsibility to verify that the same backend file
reside
on src and destination).
Live migration will work as follows:
(qemu) migrate -d tcp:0:4444 # for ordinary live migration
(qemu) migrate -d blk tcp:0:4444 # for live migration with complete
storage copy
(qemu) migrate -d blk inc tcp:0:4444 # for live migration with
incremental storage copy, storage is cow based.
The patches are against git://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git
kvm-87