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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/107496


    Title: Multi-grained Block Management to Enhance the Space Utilization of File Systems on PCM Storages
    Authors: Tseng-Yi Chen;Yuan-Hao Chang;Ming-Chang Yang;Yun-Jhu Chen;Hsin-Wen Wei;Wei-Kuan Shih
    Keywords: Phase-change memory;space utilization;byte-addressability;file systems
    Date: 2016-06
    Issue Date: 2016-09-20 02:10:21 (UTC+8)
    Publisher: Institute of Electrical and Electronics Engineers
    Abstract: Phase-change memory (PCM) is a promising candidate as a storage medium to resolve the performance gap between
    main memory and storage in battery-powered mobile computing systems. However, it is more expensive than flash memory, and thus
    introduces a more serious storage capacity issue for low-cost solutions. This issue is further exacerbated by the fact that existing file
    systems are usually designed to trade space utilization for performance over block-oriented storage devices. In this work, we propose
    a multi-grained block management strategy to improve the space utilization of file systems over PCM-based storage systems. By
    utilizing the byte-addressability and fast read/write feature of PCM, a methodology is proposed to dynamically allocate multiple sizes of
    blocks to fit the size of each file, so as to resolve the space fragmentation issue with minimized space and management overheads. The
    space utilization of file systems is analyzed with consideration of block sizes. A series of experiments was conducted to evaluate the
    efficacy of the proposed strategy, and the results show that the proposed strategy can significantly improve the space utilization of file
    systems.
    Relation: IEEE Transactions on Computers 65(6), pp.1831-1845
    DOI: 10.1109/TC.2015.2455972
    Appears in Collections:[電機工程學系暨研究所] 期刊論文

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