NDLI: SPD-RAID4: Splitting Parity Disk for RAID4 Structured Parallel SSD Arrays

Content Provider	IEEE Xplore Digital Library
Author	Wen Pan Feng Liu Tao Xie Yanyan Gao Yiming Ouyang Tian Chen
Copyright Year	2013
Description	Author affiliation: Comput. Sci. Dept., San Diego State Univ., San Diego, CA, USA (Tao Xie) \|\| Comput. & Inf. Sch., Hefei Univ. of Technol., Hefei, China (Wen Pan; Feng Liu; Yanyan Gao; Yiming Ouyang; Tian Chen)
Abstract	Data-intensive applications like video processing and bioinformatics increasingly demand a high-performance and highly reliable storage system. Hard disk drive (HDD) has long been used as a standard storage device for most existing storage systems. Recently, NAND-flash memory based solid state drives (SSDs) are gradually exploited to replace HDDs in enterprise computing infrastructures due to their salient features such as high performance, low power consumption, and excellent shock-resistance. With rapid price decreasing and capacity increasing, flash SSD based disk arrays organized in some RAID structures become feasible and greatly needed. In this paper, we propose a new RAID4 architecture called SPD-RAID4 (Splitting Parity Disk - RAID4) for parallel SSD arrays. It splits the parity disk of a traditional RAID 4 array into configurable number of smaller ones. Thus, multiple small parity SSDs operate in tandem with data SSDs to achieve a high performance and high level of reliability. We compare the performance of SPD-RAID4 with conventional RAID4 and RAID5 architectures by using both real-world traces and synthetic benchmarks. Experimental results demonstrate that in terms of mean response time SPD-RAID4 outperforms standard RAID5 structured SSD arrays by up to 20.3%. Compared with standard RAID4, SPD-RAID4 achieves a performance gain up to 40.6%.
Sponsorship	IEEE Comput. Soc.
Starting Page	9
Ending Page	16
File Size	448826
Page Count	8
File Format	PDF
ISBN	9780769550886
DOI	10.1109/HPCC.and.EUC.2013.12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-11-13
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance evaluation flash memory RAID4 Arrays Reliability Time factors RAID Flash memories Standards SSD arrays
Content Type	Text
Resource Type	Article

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