Live Migration in Bare-Metal Clouds

Live migration allows a running operating system (OS) to be moved another physical machine with negligible downtime. Unfortunately, live is not supported in bare-metal clouds, which lease machines rather than virtual offer maximum hardware performance. Since clouds have no virtualization software, implementing difficult. Previous studies proposed OS-level migration; however, prevent user intervention and broaden OS choices, should OS-independent. In addition, the overhead of mechanisms as low possible. This paper introduces BLMVisor, scheme for clouds. To achieve OS-independent lightweight migration, BLMVisor utilizes very thin hypervisor that exposes devices guest directly virtualizing devices. The captures, transfers, reconstructs device states by monitoring access from controlling effective techniques. minimize performance degradation, mostly idle after completing migration. A evaluation confirmed comparable machine.