云数据中心网络中的先应式碎片整理算法.pdf

ISSN CODEN SCYCE http sjcj nuaa edu cn Journal of Data Acquisition and Processing Vol No May Email sjcj nuaa edu cn pp DOI Tel Fax j by Journal of Data Acquisition and Processing Virtual machine VM VM VM VM VM VM TN A Provident Resource Defragmentation Algorithm for Cloud Data Center Network Guo Lei Hou Weigang College of Information Science and Engineering Northeastern University Shenyang China Abstract In a cloud data center network virtual machines VM s can be dynamically created and termi nated causing the fact that fragmented resources cannot be further utilized To solve the problem the server consolidation is proposed to minimize the number of active servers Although the approach can re duce resource fragmentation at particular time it may be over aggressive at the price of too frequent VM migration Therefore a novel provident resource defragmentation algorithm is proposed to reduce the un necessary VM migration and maxmize the profit by re consolidating fragments into available continuous resources An optimization problem is formulated and a heuristic method for obtaining near optimal re sults is developed Extensive numerical results con rm that the framework provides the highest pro t and signi cantly reduces the VM migration cost Key words cloud data center network virtual machine migration resource defragmentation Amazon EC Microsoft Azure Infrastructure asa service IaaS Virtual machine VM