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Home ยป Access Characteristic Guided Read and Write Cost Regulation for Performance Improvement on Flash Memory
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Access Characteristic Guided Read and Write Cost Regulation for Performance Improvement on Flash Memory

Authors: 

Qiao Li and Liang Shi, Chongqing University; Chun Jason Xue, City University of Hong Kong; Kaijie Wu, Chongqing University; Cheng Ji, City University of Hong Kong; Qingfeng Zhuge and Edwin H.-M. Sha, Chongqing University

Abstract: 

The relatively high cost of write operations has become the performance bottleneck of flash memory. Write cost refers to the time needed to program a flash page using incremental-step pulse programming (ISPP), while read cost refers to the time needed to sense and transfer a page from the storage. If a flash page is written with a higher cost by using a finer step size during the ISPP process, it can be read with a relatively low cost due to the time saved in sensing and transferring, and vice versa.

We introduce AGCR, an access characteristic guided cost regulation scheme that exploits this tradeoff to improve flash performance. Based on workload characteristics, logical pages receiving more reads will be written using a finer step size so that their read cost is reduced. Similarly, logical pages receiving more writes will be written using a coarser step size so that their write cost is reduced. Our evaluation shows that AGCR incurs negligible overhead, while improving performance by 15% on average, compared to previous approaches.

Qiao Li, Chongqing University

Liang Shi, Chongqing University

Chun Jason Xue, City University of Hong Kong

Kaijie Wu, Chongqing University

Cheng Ji, City University of Hong Kong

Qingfeng Zhuge, Chongqing University

Edwin H.-M. Sha, Chongqing University

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BibTeX
@inproceedings {194422,
author = {Qiao Li and Liang Shi and Chun Jason Xue and Kaijie Wu and Cheng Ji and Qingfeng Zhuge and Edwin H.-M. Sha},
title = {Access Characteristic Guided Read and Write Cost Regulation for Performance Improvement on Flash Memory},
booktitle = {14th {USENIX} Conference on File and Storage Technologies ({FAST} 16)},
year = {2016},
isbn = {978-1-931971-28-7},
address = {Santa Clara, CA},
pages = {125--132},
url = {https://www.usenix.org/conference/fast16/technical-sessions/presentation/li-qiao},
publisher = {{USENIX} Association},
month = feb,
}
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