Block replication is a very important feature which is used for
continuous checkpoints(for example: COLO).
You can get the detailed information about block replication from here:
http://wiki.qemu.org/Features/BlockReplication
Usage:
Please refer to docs/block-replication.txt
You can get the patch here:
https://github.com/Pating/qemu/tree/changlox/block-replication-v19
You can get the patch with framework here:
https://github.com/Pating/qemu/tree/changlox/colo_framework_v18
TODO:
1. Continuous block replication. It will be started after basic functions