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New Computer Systems Data Have Been Reported by Q. Zhang and Co-Authors (Courier: Multi-dimensional QoS guarantees for the consolidated storage...

July 31, 2014



New Computer Systems Data Have Been Reported by Q. Zhang and Co-Authors (Courier: Multi-dimensional QoS guarantees for the consolidated storage system)

By a News Reporter-Staff News Editor at Computer Weekly News -- Investigators discuss new findings in Computer Systems. According to news reporting out of Wuhan, People's Republic of China, by VerticalNews editors, research stated, "The increasing cost and complexity of data management is driving data centers to consolidate resource and provide storage service for multiplex applications. Therefore, storage systems must be able to guarantee multi-dimensional Quality of Service (QoS) for various applications."

Our news journalists obtained a quote from the research, "However, satisfying performance targets for each workload is challenging, because that the I/O characteristics of workloads usually varies widely and capability of storage system changes significantly. In this paper, we design and implement a novel QoS scheduler, Courier, to maintain satisfactory performance for applications even in this highly-volatile scenario. Courier dynamically alternates between a feedback-based latency controller and reward budget-based scheduling to achieve per-application performance requirement. The feedback-based controller is employed to estimate request service times and adjust scheduling strategy dynamically. Based on the estimation, it can identify time-critical requests from throughput-sensitive requests and schedule applications with time-critical requests preferentially to avoid latency violations. In addition, Courier rewards well-behavior application with more budget to maintain high storage utilization while providing performance guarantees."

According to the news editors, the research concluded: "We evaluate the effectiveness of our approach using synthetic and real workloads, and the results show that Courier has good ability to achieve per-application performance targets."

For more information on this research see: Courier: Multi-dimensional QoS guarantees for the consolidated storage system. Future Generation Computer Systems-The International Journal of Grid Computing and Escience, 2014;37():97-107. Future Generation Computer Systems-The International Journal of Grid Computing and Escience can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands.

Our news journalists report that additional information may be obtained by contacting Q. Zhang, WuHan Natl Lab Optoelect, Wuhan, People's Republic of China. Additional authors for this research include D. Feng and F. Wang.

Keywords for this news article include: Wuhan, People's Republic of China, Asia, Computer Systems

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Computer Weekly News


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