earticle

영어

With cloud computing continues to mature and widely used, the availability guarantee of cloud system becomes one of the key issues. In the cloud system based on virtualization, reliability of virtual machine is an important premise to guarantee the quality of service of cloud computing. Recent research shows, applications deployed inside the virtual machine will appear performance degradation even failure after long-term operation, namely "the aging phenomenon". Prediction, diagnosis and rejuvenation of the virtual machine is a relatively complete technical framework to guarantee reliability of the cloud computing system. In this paper, we propose a software rejuvenation framework based on group migration of virtual machine to guarantee reliability of the distributed system. First construct the dependency relationship of the virtual machines; then diagnosis the software aging of virtual machine; decide the optimal virtual machine set which need to migration. Compared with the traditional single computing nodes restart/ recovery mode, downtime of group rejuvenation can be 61.53% of downtime of traditional mode. In the cloud computing environment, group rejuvenation method can ensure the availability of cloud systems more effectively than the conventional rejuvenation method.