云计算环境下，工作任务的调度和计算资源的分配受到SLA的约束。不同的工作任务要求不同的QoS，采用具有SLA参数的约束条件，对任务划分优先级，形成优先级队列。在对该任务分配计算资源时，采用资源等级队列的方法，分配合理的工作节点已完成任务。%Under cloud computing environment,task scheduling and computing resources allocation is constrained by the SLA. Different tasks require different QoS,so the work queue is classified with constraints of the SLA parameter. Task is allocated on the computing resources by reasonable assignment of work node in the resource level queue.
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