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SWANS: An Interdisk Wear-Leveling Strategy for RAID-0 Structured SSD Arrays

Authors:

Abhinav SharmaAuthors Info & Claims

ACM Transactions on Storage (TOS), Volume 12, Issue 3

Article No.: 10, Pages 1 - 21

https://doi.org/10.1145/2756555

Published: 29 April 2016 Publication History

Abstract

NAND flash memory–based solid state disks (SSDs) have been widely used in enterprise servers. However, flash memory has limited write endurance, as a block becomes unreliable after a finite number of program/erase cycles. Existing wear-leveling techniques are essentially intradisk data distribution schemes, as they can only even wear out across the flash medium within a single SSD. When multiple SSDs are organized in an array manner in server applications, an interdisk wear-leveling technique, which can ensure a uniform wear-out distribution across SSDs, is much needed. In this article, we propose a novel SSD-array level wear-leveling strategy called SWANS (<u>S</u>moothing <u>W</u>ear <u>A</u>cross <u>N</u> <u>S</u>SDs) for an SSD array structured in a RAID-0 format, which is frequently used in server applications. SWANS dynamically monitors and balances write distributions across SSDs in an intelligent way. Further, to evaluate its effectiveness, we build an SSD array simulator on top of a validated single SSD simulator. Next, SWANS is implemented in its array controller. Comprehensive experiments with real-world traces show that SWANS decreases the standard deviation of writes across SSDs on average by 16.7x. The gap in the total bytes written between the most written SSD and the least written SSD in an 8-SSD array shrinks at least 1.3x.

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Cited By

Wang SCao QJiang HLu ZYao JChen YPan A(2024)Explorations and Exploitation for Parity-based RAIDs with Ultra-fast SSDsACM Transactions on Storage10.1145/362799220:1(1-32)Online publication date: 30-Jan-2024
https://dl.acm.org/doi/10.1145/3627992
Li PXie PCao Q(2024)SSRAID: A Stripe-Queued and Stripe-Threaded Merging I/O Strategy to Improve Write Performance of Serial Interface SSD RAIDIEEE Transactions on Parallel and Distributed Systems10.1109/TPDS.2024.344308335:10(1841-1853)Online publication date: Oct-2024
https://doi.org/10.1109/TPDS.2024.3443083
Gu YLiu LWu CLi JGuo M(2024)Ada-WL: An Adaptive Wear-Leveling Aware Data Migration Approach for Flexible SSD Array Scaling in ClustersIEEE Transactions on Computers10.1109/TC.2024.339849373:8(1967-1982)Online publication date: 1-Aug-2024
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Index Terms

SWANS: An Interdisk Wear-Leveling Strategy for RAID-0 Structured SSD Arrays

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Published In

cover image ACM Transactions on Storage

ACM Transactions on Storage Volume 12, Issue 3

June 2016

237 pages

ISSN:1553-3077

EISSN:1553-3093

DOI:10.1145/2932205

Editor:
Darrell D. E. Long
University of California Santa Cruz, USA

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Copyright © 2016 ACM.

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Association for Computing Machinery

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Publication History

Published: 29 April 2016

Accepted: 01 April 2015

Revised: 01 November 2014

Received: 01 April 2014

Published in TOS Volume 12, Issue 3

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Cited By

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https://dl.acm.org/doi/10.1145/3627992
Li PXie PCao Q(2024)SSRAID: A Stripe-Queued and Stripe-Threaded Merging I/O Strategy to Improve Write Performance of Serial Interface SSD RAIDIEEE Transactions on Parallel and Distributed Systems10.1109/TPDS.2024.344308335:10(1841-1853)Online publication date: Oct-2024
https://doi.org/10.1109/TPDS.2024.3443083
Gu YLiu LWu CLi JGuo M(2024)Ada-WL: An Adaptive Wear-Leveling Aware Data Migration Approach for Flexible SSD Array Scaling in ClustersIEEE Transactions on Computers10.1109/TC.2024.339849373:8(1967-1982)Online publication date: 1-Aug-2024
https://dl.acm.org/doi/10.1109/TC.2024.3398493
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Wang SCao QLu ZYao J(2022)Mlog: Multi-log Write Buffer upon Ultra-fast SSD RAIDProceedings of the 51st International Conference on Parallel Processing10.1145/3545008.3545034(1-11)Online publication date: 29-Aug-2022
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