US Patent 9798497 Storage area network emulation

Generating a virtual storage area network (VSAN) is disclosed. From the perspective of a customer's virtual machine, the VSAN is a logical network of storage devices that provide features that are typically associated with a physical storage access network, such as block level data storage; logical disk arrays; tape libraries; optical jukeboxes; quality of service; disk mirroring, backup and restoration services; archival and retrieval of archived data; data migration from one virtual storage device to another; sharing of data among different virtual machines in a network; and the incorporation of virtual subnetworks.