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Virtualization improves the utilization ratio of resource, saving considerable amount of equipment, energy, management, etc. However, the benefits of virtualization are at the penalty of fairness but inefficient resource sharing. Various tasks in virtual domains often have different demands of resources. Therefore, allocation of resource and scheduling function are particularly important. A weighted max-min fairness allocation of disk resources is proposed in virtual platform. The authors focus on properties of sharing incentive, initial irrelevant and Pareto efficiency while designing the allocation algorithm. This Allocator is implemented in Xen virtual block devices manager. Tests in this paper show that the weighted max-min Allocator has a better allocation of resources and guarantees the quality of services.
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