Reinforcement Learning-Based Read Performance Throttling to Enhance Lifetime of 3D NAND SSD

Yong Cheng Liaw, Shuo Han Chen, Yu Pei Liang

研究成果: Conference contribution同行評審

摘要

With high storage density and low cost per bit, 3D NAND flash has dominated the market of modern solid-state drives (SSDs). Nevertheless, the growing number of stacked layers and the evolving multi-bits-per-cell technology of 3D NAND flash have led to the issue of fast accumulated read disturbance. Read disturbance leads to data bit errors and requires the error correction code (ECC) scheme to remove bit errors to correct data retrieval during read operations. Nevertheless, owing to the process of read retry and reference voltage adjustment of the ECC scheme, the read performance of 3D NAND flash deteriorates as the number of error bits grows. To mitigate the unwanted impact of prolonged read latency and maintain top read performance, modern SSDs actively rewrite stored data to remove error bits when the read latency becomes higher. However, actively removing data bit errors through data rewrites could wear out the SSDs prematurely and ultimately consume the whole lifetime of SSDs. To resolve such concerns, this paper proposes lowering the number of data rewrites through throttling the read performance of 3D NAND flash-based SSDs via reinforcement learning techniques to adaptively meet the performance requirements of different applications. Trace-driven experiments have shown promising results.

原文English
主出版物標題Proceedings - 2024 13th IEEE Non-Volatile Memory Systems and Applications Symposium, NVMSA 2024
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9798350388558
DOIs
出版狀態Published - 2024
事件13th IEEE Non-Volatile Memory Systems and Applications Symposium, NVMSA 2024 - Sokcho, 韓國
持續時間: 21 8月 202423 8月 2024

出版系列

名字Proceedings - 2024 13th IEEE Non-Volatile Memory Systems and Applications Symposium, NVMSA 2024

Conference

Conference13th IEEE Non-Volatile Memory Systems and Applications Symposium, NVMSA 2024
國家/地區韓國
城市Sokcho
期間21/08/2423/08/24

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