Patent ID: 7925850

Claim:
A method comprising: determining, at a destination host, a source signature associated with additional information during a migration of a virtual machine from a source host to the destination host, the source signature having a unique association in a source data structure with source content stored in a portion of memory at the source host; storing the source content in a portion of address space of the virtual machine in the destination host; determining if the source signature matches a host signature in a host data structure, the host signature having a unique association with host content stored in a portion of memory in the destination host memory; if the source signature matches the host signature, performing: using the additional information to determine if the unique association between the source content and the source signature in the source data structure matches the unique association between the host content and the host signature in the host data structure; and storing backing information indicating the portion of the address space of the virtual machine storing the source content is backed with the portion of the destination host memory storing the host content.