Migration of a virtual machine between hypervisors

摘要

The invention relates to a method for replacing a source hypervisor (130.1) by a target hypervisor (130.3) in a system (100) comprising a first level hypervisor (121) managing multiple logical partitions (101, 103, 105) to share a set of resources of a server (125). The source hypervisor (130.1) enables at least one source virtual machine (106.1) to share said resources that are assigned to a source logical partition of the multiple logical partitions where the source hypervisor (130.1) runs. The target hypervisor (130.3) enables at least one target virtual machine (106.5) to share said resources that are assigned to a target logical partition of the multiple logical partitions where the target hypervisor (130.3) runs, wherein memory segments (206.1) of a physical memory (123) of the server (125) are assigned to the at least one source virtual machine (106.1). A memory map is used to transfer the memory state across the virtual machine managers.