Alibaba Group Holding Limited
System and method for live migration of a virtual machine

Abstract:

Systems and methods for live migration of a virtual machine are provided. The methods include: copying, by a destination physical machine according to a recorded dirty page table, dirty memory pages corresponding to dirty memory page identifiers in the dirty page table to a source physical machine when live migration of a virtual machine fails in a delayed-copy mode, and updating and storing, by the source physical machine, the copied dirty memory pages. When live migration of a virtual machine fails, dirty memory pages corresponding to dirty memory page identifiers in a dirty page table are copied to a source physical machine to be updated and stored, so that the source physical machine has complete and the latest memory pages, and the virtual machine can roll back to and run independently on the source physical machine.