The University of Texas-Pan American
In this paper, the authors proposed a fast Virtual Machine (VM) storage migration technique. Virtual machine storage migration can migrate entire VM states to other hosts, including VM disk images. It is widely used for cross-data-center load management. However, VM disk images generally have large file sizes (typically 1-30GB). Thus, storage migration was time-consuming. To address this problem, they introduce the deduplication technique into traditional VM storage migration. They focused on the fact that it is possible to return VMs from the new VM hosts. For example, a VM first migrates from host A to host B. Next, the VM returns from host B to host A. There will then be additional reusable disk pages in host A.