Improving Performance of Parallel I/O Sys-tems through Selective and Layout-Aware SSD Cache

	Improving Performance of Parallel I/O Sys-tems through Selective and Layout-Aware SSD Cache
	Shuibing He; Yang Wang; Xian-He Sun
刊名	IEEE Transactions on Parallel and Distributed Systems
	2016
英文摘要	Parallel file systems (PFS) are widely-used to ease the I/O bottleneck of modern high-performance computing systems. However, PFSs do not work well for small requests, especially small random requests. Newer Solid State Drives (SSD) have excellent performance on small random data accesses, but also incur a high monetary cost. In this study, we propose SLA-Cache, a Selective and Layout-Aware Cache system that employs a small set of SSD-based file servers as a cache of conventional HDD-based file servers. SLA-Cache uses a novel scheme to identify performance-critical data, and conducts a selective cache admission (SCA) policy to fully utilize SSD-based file servers. Moreover, since data layout of the cache system can also largely influence its access performance, SLA-Cache applies a layout-aware cache placement scheme (LCP) to store data on SSD-based file servers. By storing data with an optimal layout requiring the lowest access cost among three typical layout candidates, LCP can further improve system performance. We have implemented SLA-Cache under the MPICH2 I/O library. Experimental results show that SLA-Cache can significantly improve I/O throughput, and is a promising approach for parallel applications.
收录类别	SCI
原文出处	http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7390309
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/10246]
专题	深圳先进技术研究院_数字所
作者单位	IEEE Transactions on Parallel and Distributed Systems
推荐引用方式 GB/T 7714	Shuibing He,Yang Wang,Xian-He Sun. Improving Performance of Parallel I/O Sys-tems through Selective and Layout-Aware SSD Cache[J]. IEEE Transactions on Parallel and Distributed Systems,2016.
APA	Shuibing He,Yang Wang,&Xian-He Sun.(2016).Improving Performance of Parallel I/O Sys-tems through Selective and Layout-Aware SSD Cache.IEEE Transactions on Parallel and Distributed Systems.
MLA	Shuibing He,et al."Improving Performance of Parallel I/O Sys-tems through Selective and Layout-Aware SSD Cache".IEEE Transactions on Parallel and Distributed Systems (2016).