VDN: Virtual Machine Image Distribution Network for Cloud Data Centers
Cloud computing centers face the key challenge of provisioning diverse virtual machine instances in an elastic and scalable manner. To address this challenge, the authors have performed an analysis of VM instance traces collected at six production data centers during four months. One key finding is that the number of instances created from the same VM image is relatively small at a given time and thus conventional file based p2p sharing approaches may not be effective. Based on the understanding that different VM image files often have many common chunks of data, they propose a chunk-level Virtual machine image Distribution Network (VDN).