1. A method for transferring guest physical memory from a source host to a destination host during live migration of a virtual machine (VM) to which the guest physical memory is associated, the source host being a physical computer hosting the VM prior to the live migration and the destination host being a physical computer hosting the VM after the live migration completes, the method comprising: creating a file on a shared datastore, the file on the shared datastore being accessible to both the source host and the destination host; transmitting pages of the guest physical memory from the source host to the destination host over a network connection that places the source host and destination in communication with each other; and writing pages of the guest physical memory to the file so that the destination host can retrieve the written guest physical pages from the file, wherein the writing of pages of the guest physical memory occurs concurrently with the transmitting of the pages over the network connection.