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Issue No. 11 - Nov. (2017 vol. 66)
ISSN: 0018-9340
pp: 1932-1945
Fenggang Wu , Department of Computer Science and Engineering, University of Minnesota, Twin Cities, Minneapolis, MN
Ziqi Fan , Department of Computer Science and Engineering, University of Minnesota, Minneapolis, MN
Ming-Chang Yang , Graduate Institute of Networking and Multimedia, National Taiwan University, Taipei, Taiwan
Baoquan Zhang , Department of Computer Science and Engineering, University of Minnesota, Minneapolis, MN
Xiongzi Ge , Department of Computer Science and Engineering, University of Minnesota, Minneapolis, MN
David H.C. Du , Department of Computer Science and Engineering, University of Minnesota, Minneapolis, MN
ABSTRACT
Shingled Magnetic Recording (SMR) drives can benefit large-scale storage systems by reducing the Total Cost of Ownership (TCO) of dealing with explosive data growth. Among all existing SMR models, Host Aware SMR (HA-SMR) looks the most promising for its backward compatibility with legacy I/O stacks and its ability to use new SMR-specific APIs to support host I/O stack optimization. Building storage systems using HA-SMR drives calls for a deep understanding of the drive’s performance characteristics. To accomplish this, we conduct in-depth performance evaluations on HA-SMR drives with a special emphasis on the performance implications of the SMR-specific APIs and how these drives can be deployed in large storage systems. We discover both favorable and adverse effects of using HA-SMR drives under various workloads. We also investigate the drive’s performance under legacy production environments using real-world enterprise traces. Finally, we propose a novel host-controlled buffer that can help to reduce the severity of the decline in HA-SMR performance under our discovered unfavorable I/O access patterns. Without a detailed comprehensive design, we show the potential of the host-controlled buffer by a case study.
INDEX TERMS
Media, Drives, Cleaning, Random access memory, Performance evaluation, Heat-assisted magnetic recording
CITATION
Fenggang Wu, Ziqi Fan, Ming-Chang Yang, Baoquan Zhang, Xiongzi Ge, David H.C. Du, "Performance Evaluation of Host Aware Shingled Magnetic Recording (HA-SMR) Drives", IEEE Transactions on Computers, vol. 66, no. , pp. 1932-1945, Nov. 2017, doi:10.1109/TC.2017.2713360
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