Relieving self-healing SSDs of heal storms

Li-Pin Chang, Sheng Min Huang, Kun Lin Chou

研究成果: Conference contribution同行評審

3 引文 斯高帕斯(Scopus)

摘要

Building self-healing SSDs is proven feasible by recent studies. When the stress of a block becomes critical, it can be healed to remove part of the stress. However, with wear leveling, all blocks are evenly worn and have similar stress, and all blocks could undergo the healing process within a short period of time. The intensive heal operations, called heal storms, cause highly unpredictable I/O performance and storage reliability. Inspired by the even distribution of erase counts under wear leveling, we propose to operate wear leveling on virtual erase counts instead of real erase counts. When the balance among virtual erase counts is achieved through wear leveling, all real erase counts become evenly dispersed in a controlled interval. In this way, blocks will undergo healing at different times. Virtual erase counts are progressively adjusted such that all blocks reach their endurance limit when the SSD permanently retires. Our results show that our approach successfully resolved the heal storm problem without impacting on the SSD lifespan.

原文English
主出版物標題SYSTOR 2017 - Proceedings of the 10th ACM International Systems and Storage Conference
發行者Association for Computing Machinery, Inc
ISBN(電子)9781450350358
DOIs
出版狀態Published - 22 五月 2017
事件10th ACM International Systems and Storage Conference, SYSTOR 2017 - Haifa, Israel
持續時間: 22 五月 201724 五月 2017

出版系列

名字SYSTOR 2017 - Proceedings of the 10th ACM International Systems and Storage Conference

Conference

Conference10th ACM International Systems and Storage Conference, SYSTOR 2017
國家Israel
城市Haifa
期間22/05/1724/05/17

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