摘要： 分析影响服务质量的构件资源需求与资源依赖关系模型，提出一种自适应中间件框架。该框架能动态感知负载变化，自适应调整服务器配置参数，确保应用的服务质量。采用回溯算法搜索最优配置，以满足性能需求。以一个信息查询系统作为测试用例进行实验，结果表明，该框架可以提高应用程序的性能。

关键词: 需求模型, 服务质量, 自适应

Abstract: This paper analyzes the model of component resource requirement and dependence relations between them which affect the Quality of Service(QoS). It presents a self-adaptive middleware framework which can react to workload changes dynamically and self-adaptively tune server configuration parameters to preserve the application QoS. This framework adopts backtracking algorithms to search for the best configuration to satisfy performance requirement. Results of experiment using information query system as test case show that the application performance can be improved by this framework.

Key words: requirement model, QoS, self-adaptive

中图分类号: 

• N945.15