EFFICENT MIGRATION OF VIRTUAL FUNCTIONS TO ENABLE HIGH AVAILABILITY AND RESOURCE REBALANCE

摘要

A computing platform (source) supporting virtualization comprises a plurality of virtual machines each including a virtual function driver and a guest operating system, and a hardware block including a plurality of virtual functions and visible states and invisible states. The virtual function driver or a guest OS or a virtual machine monitor further includes a self-emulation layer to create a shadow state, which emulates the invisible states of the virtual function, which is to be migrated. The virtual function driver uses contents of the shadow state to migrate one or more of the plurality of virtual functions to a target virtual machine. The source and the target virtual machines are included in a cloud data center and the virtual functions, migrated to the target virtual machine is highly available to provide services.