Research Of Multi-Virtual Machine Resource Dynamic Allocation Mechanism

This paper base on the multi-computing system virtualization study, and the current use of cluster laboratory use of the environment, with the development and application technology of virtual machine .Proposed a virtual machine environment of multi-cluster virtual machine management concepts, and completed a prototype system - VNIX. As a virtual technology in Cluster environment , should support high-efficiency, scalable, personalized computing systems dynamic mechanism Construction; establish an user-oriented, application-oriented approach Virtual Computing System; complete the resource adjustable Virtual Machine Manager; according to users or applications of real-time demand, timely and rational allocation and scheduling of server resources. According to VNIX system design and application environment, we proposed the principle of feedback adaptive multi-granularity of information resource management and allocation mechanism. The virtual machine dynamic memory allocation based on the feedback Guest OS dynamic memory allocation strategy based on the tax rate and the Host OS memory optimization strategy, Virtual Machine for the dynamic allocation of CPU virtual machine used for the operational status of coarse-grained adjustment and for each specific VCPU load and practical application of granular optimization strategy.The function test and the performance test show the success design of the VNIX system. Meanwhile, in Live-Migrate test, system downtime reduced by 23%, especially in high-load, the downtime even short more than 50%. In the I/O performance, through the dynamic allocation of resources, VM I/O transfer speed rises from 22.3 KB / S to average of 31.9 KB/S, that VNIX dynamic resource allocation have a good performance improvements.