1. A storage management computer for managing offloading of storage workload between a storage controller of a storage system and one or more host computers, the storage management computer comprising: a processor; a controller operable to request a virtual machine management computer to register the storage controller as a host computer, and to send, to the virtual machine management computer, storage processes information of storage processes in the storage system which can be offloaded as virtual machines in order for the virtual machine management computer to register the storage processes as virtual machines.