高性能服务器集群部署系统传输模型研究

对基于映像的集群部署系统传输模型进行了研究,提出了基于多叉树的TFTP传输模型以解决TFTP服务器性能瓶颈问题.依据集群规模增大、系统平均带宽下降的特点,提出了基于带宽受损的动态流水线模型,模型给出了节点到达率和部署系统性能的关系.通过数学解析法、数值模拟法和实际测试对模型进行了验证.为使所提模型具有较好的可扩展性,以交换机为单位对系统进行分域,各域并行工作.作者对文中所提模型与其它3种映像传输模型———组播、可靠组播和BT进行了测试比较,结果表明,组播和可靠组播的性能较优,但可靠性难以保障,不适合传输映像文件,基于带宽受损的动态流水线模型有较高的可靠性且性能优于BT,其部署596MB的映像到48个服务器的时间仅为17.2s.

Study on Transfer Model of Deployment System for High Performance Server Cluster

This paper proposes a multi-branch tree based TFTP transfer model to relieve the performance bottleneck of TFTP server.According to the fact that average bandwidth of cluster system decreases with the increase of the size of a cluster,this paper proposes bandwidth loss-based dynamic pipeline image transfer model which reveals the relation between node arrival and deployment performance.The proposed model is validated by mathematical analysis,simulation and real measurement.To improve the scalability of the proposed model,the cluster system is divided into partitions,and each partition has only one switch.All partitions concurrently work.A comparative measurement is performed among multicast,dependable multicast,BT and the proposed model.The results show that multicast and reliable multicast have better performance,however with worse reliability.The performance of the proposed model outperforms that of BT,and it just takes 17.2 seconds to deploy a 596MB system image to 48 servers.