Abstract
Flash-based solid state disks (SSDs) have been widely used for its high performance, low power, and concurrency features. With the increase in storage capacity, the reliability problem of SSD is becoming increasingly serious. In this paper, we implemented a technique based SSDs by constructing RAID-5 to enhance the reliability of SSD while maintaining its performance. First, we construct RAID-5 stripe based on SSD physical address which means no mapping tables to store stripe information. Second, our schema constructs dynamic stripe with log-structure to solve the inherent small write problem associated with conventional RAID-5. Third, since the correlation between data stripe, we realize garbage collection based on stripe group. Finally, we conduct extensive simulations using real-world traces and synthetic benchmarks in the SSDsim [1]. The experimental results show that we consume less than 7% of the performance and 6% of the storage consumption of SSD to achieve inner-channel RAID-5 to improve the reliability of SSD.
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Acknowledgments
We are grateful to our anonymous reviewers for their suggestions to improve this paper. This work is supported by the National High-Tech Research and Development Projects (863) and the National Natural Science Foundation of China under Grant Nos. 2015AA015305, 61232003, 61332003, 61202121.
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Feng, Y., Xing, Y., Xiao, N., Liu, F. (2016). A Channel-Level RAID5 Schema Based Physical Address in SSD. In: Xu, W., Xiao, L., Li, J., Zhang, C., Zhu, Z. (eds) Computer Engineering and Technology. NCCET 2016. Communications in Computer and Information Science, vol 666. Springer, Singapore. https://doi.org/10.1007/978-981-10-3159-5_12
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DOI: https://doi.org/10.1007/978-981-10-3159-5_12
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