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arXiv 1601.06262cs.NI
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响应时间优化的分布式云资源分配

Response-Time-Optimized Distributed Cloud Resource Allocation

Matthias Keller, Holger Karl

摘要:

网络和云计算的当前趋势是在广泛分散的地方提供计算资源,例如网络功能虚拟化。这为广泛的服务部署铺平了道路,并可以提高服务质量;附近的服务器可以减少用户感知的响应时间。但是,如果服务器的利用率已经很高,那么总是使用最近的服务器是一个糟糕的决定。本文研究了用户对分布资源的最优分配问题--一个带容量约束的凸组合排队系统的设施选址问题。我们根据使用的资源数量确定响应时间。这使得服务提供商能够在资源成本和相应的服务质量之间取得平衡。我们还提出了一个线性问题的重新表述,显示出小的最优性差距和更快的解决时间;这种加速使需求变化的快速反应成为可能。最后,我们比较解决方案,无论是考虑或忽略排队系统,并讨论了响应时间减少使用更复杂的模型。我们的研究得到了大规模数值评估的支持。

英文摘要:

A current trend in networking and cloud computing is to provide compute resources over widely dispersed places exemplified by initiatives like Network Function Virtualisation. This paves the way for a widespread service deployment and can improve service quality; a nearby server can reduce the user-perceived response times. But always using the nearest server is a bad decision if that server is already highly utilized. This paper investigates the optimal assignment of users to widespread resources -- a convex capacitated facility location problem with integrated queuing systems. We determine the response times depending on the number of used resources. This enables service providers to balance between resource costs and the corresponding service quality. We also present a linear problem reformulation showing small optimality gaps and faster solving times; this speed-up enables a swift reaction to demand changes. Finally, we compare solutions by either considering or ignoring queuing systems and discuss the response time reduction by using the more complex model. Our investigations are backed by large-scale numerical evaluations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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