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Deterministic service guarantees for nand flash using partial block cleaning

Published: 19 October 2008 Publication History
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  • Abstract

    NAND flash idiosyncrasies such as bulk erase and wear leveling results in non-linear and unpredictable read/write access times. In case of application domains such as streaming multimedia and real-time systems, a deterministic read/write access time is desired during design time. We propose a novel NAND flash translation layer called GFTL that guarantees fixed upper bounds (i.e., worst case service rates) for reads and writes that are comparable to a theoretical ideal case. Such guarantees are made possible by eliminating sources of non-determinism in GFTL design and using partial block cleaning. GFTL performs garbage collection in partial steps by dividing the garbage collection of a single block into several chunks, thereby interleaving and hiding the garbage collection latency while servicing requests.
    Further, GFTL guarantees are independent of flash utilization, size or state. Along with theoretical bounds, benchmark results show the efficacy of our approach. Based on our experiments, GFTL requires an additional 16% of total blocks for flash management. GFTL service guarantees can be calculated from flash specifications. Thus, with GFTL, a designer can determine the service guarantees and size requirements apriori, during design time.

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    cover image ACM Conferences
    CODES+ISSS '08: Proceedings of the 6th IEEE/ACM/IFIP international conference on Hardware/Software codesign and system synthesis
    October 2008
    288 pages
    ISBN:9781605584706
    DOI:10.1145/1450135
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    New York, NY, United States

    Publication History

    Published: 19 October 2008

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    Author Tags

    1. determinism
    2. embedded systems
    3. file systems
    4. nand flash
    5. qos
    6. real-time
    7. storage

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    ESWEEK 08
    ESWEEK 08: Fourth Embedded Systems Week
    October 19 - 24, 2008
    GA, Atlanta, USA

    Acceptance Rates

    CODES+ISSS '08 Paper Acceptance Rate 44 of 143 submissions, 31%;
    Overall Acceptance Rate 280 of 864 submissions, 32%

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    ESWEEK '24
    Twentieth Embedded Systems Week
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    Cited By

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    • (2024)An Adaptive Real-Time Garbage Collection Method Based on File Write PredictionTheoretical Aspects of Software Engineering10.1007/978-3-031-64626-3_13(224-241)Online publication date: 14-Jul-2024
    • (2022)Duplicates also Matter! Towards Secure Deletion on Flash-based Storage Media by Removing DuplicatesProceedings of the 2022 ACM on Asia Conference on Computer and Communications Security10.1145/3488932.3523255(54-66)Online publication date: 30-May-2022
    • (2022)Telomere: Real-Time NAND Flash StorageACM Transactions on Embedded Computing Systems10.1145/347915721:1(1-24)Online publication date: 14-Jan-2022
    • (2022)MQSim-E: An Enterprise SSD SimulatorIEEE Computer Architecture Letters10.1109/LCA.2022.314477321:1(13-16)Online publication date: 1-Jan-2022
    • (2021)Observation and Optimization on Garbage Collection of Flash Memories: The View in Performance CliffMicromachines10.3390/mi1207084612:7(846)Online publication date: 20-Jul-2021
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    • (2021)Edges: Evenly Distributing Garbage-Collections for Enterprise SSDs via Stochastic Optimization2021 IEEE International Conference on Networking, Architecture and Storage (NAS)10.1109/NAS51552.2021.9605402(1-4)Online publication date: Oct-2021
    • (2021)Dynamic Chip Clustering and Task Allocation for Real-time Flash2021 58th ACM/IEEE Design Automation Conference (DAC)10.1109/DAC18074.2021.9586252(1153-1158)Online publication date: 5-Dec-2021
    • (2020)FTRM: A Cache-Based Fault Tolerant Recovery Mechanism for Multi-Channel Flash DevicesElectronics10.3390/electronics91015819:10(1581)Online publication date: 27-Sep-2020
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