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QoS prediction for dynamic reconfiguration of component based software systems

机译：用于基于组件的软件系统的动态重新配置的QoS预测

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摘要

It is difficult to choose the appropriate reconfiguration approach to satisfy the quality of service (QoS) requirements of a software system if the properties of that approach are not known. This problem significantly restricts the application of dynamic reconfiguration approaches to mission-critical or non-stop systems, where QoS is a major performance indicator. This paper proposes a model to predict how the QoS of a running software system will be affected by dynamic reconfiguration and show how it out-performed the existing methods in this area in three aspects. First, unlike existing simulation based models, this prediction model was based on easily implemented mathematical functions. Second, compared with the time-consuming simulation approaches, QoS prediction using this model was achieved in a shorter timeframe. Third, unlike the existing approaches that are built on different platforms for individual scenarios, this model generalized QoS prediction onto a single virtual platform that was modeled by hardware and software conditions. The proposed model has been verified by reconfiguration simulation to a reasonable level of accuracy and thus the viability and safety for the use of the model has been confirmed.
机译：如果该方法的属性未知，则很难选择适当的重新配置方法来满足软件系统的服务质量（QoS）要求。这个问题极大地限制了动态重新配置方法在关键任务或不间断系统中的应用，在这些系统中，QoS是主要的性能指标。本文提出了一个模型，用于预测运行中的软件系统的QoS将如何受到动态重新配置的影响，并从三个方面展示其优于该领域现有方法的性能。首先，与现有的基于仿真的模型不同，此预测模型基于易于实现的数学函数。其次，与费时的仿真方法相比，使用此模型的QoS预测在较短的时间内完成。第三，与针对不同情况在不同平台上构建的现有方法不同，该模型将QoS预测推广到了一个由硬件和软件条件建模的虚拟平台上。通过重新配置仿真将提出的模型验证到合理的准确性水平，因此已经确认了使用该模型的可行性和安全性。

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