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	SAR: SSD assisted restore optimization for deduplication-based storage systems in the cloud
	Mao, Bo ; Jiang, Hong ; Wu, Suzhen ; Fu, Yinjin ; Tian, Lei ; Mao B(毛波) ; Wu SZ(吴素贞)
	2012
关键词	Distributed computer systems Energy efficiency Hard disk storage Restoration Space platforms
英文摘要	Conference Name:2012 IEEE 7th International Conference on Networking, Architecture and Storage, NAS 2012. Conference Address: Xiamen, Fujian, China. Time:June 28, 2012 - June 30, 2012.; The explosive growth of digital content results in enormous strains on the storage systems in the cloud environment. The data deduplication technology has been demonstrated to be very effective in shortening the backup window and saving the network bandwidth and storage space in cloud backup, archiving and primary storage systems such as VM platforms. However, the delay and power consumption of the restore operations from a deduplicated storage can be significantly higher than those without deduplication. The main reason lies in the fact that a file or block is split into multiple small data chunks that are often located in non-sequential locations on HDDs after deduplication, which can cause a subsequent read operation to invoke many HDD I/O requests involving multiple disk seeks. To address this problem, in this paper we propose SAR, an SSD Assisted Restore scheme, that effectively exploits the high random-read performance and low powerconsumption properties of SSDs and the unique data sharing characteristic of deduplication-based storage system by storing in SSDs the unique data chunks with high reference count, small size and non-sequential characteristics. In this way, many critical random-read requests to HDDs are replaced by read requests to SSDs, thus significantly improving the system performance and energy efficiency. The extensive trace-driven and VM restore evaluations on the prototype implementation of SAR show that SAR outperforms the traditional deduplication-based schemes significantly, in terms of both restore performance and energy efficiency. 漏 2012 IEEE.
语种	英语
出处	http://dx.doi.org/10.1109/NAS.2012.48
出版者	IEEE Computer Society
内容类型	其他
源URL	[http://dspace.xmu.edu.cn/handle/2288/85788]
专题	软件学院－会议论文
推荐引用方式 GB/T 7714	Mao, Bo,Jiang, Hong,Wu, Suzhen,et al. SAR: SSD assisted restore optimization for deduplication-based storage systems in the cloud. 2012-01-01.

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