New Computer Systems Data Have Been Reported by Q. Zhang and Co-Authors (Courier: Multi-dimensional QoS guarantees for the consolidated storage system)
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.
Our news journalists report that additional information may be obtained by contacting Q. Zhang, WuHan Natl Lab Optoelect,
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