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A New Method for Reconstructing Data Considering the Factor of Selected Provider Nodes Set in Distributed Storage System

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  • Miao Ye

    (School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
    State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China
    School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China)

  • Qinghao Zhang

    (School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China)

  • Ruoyu Wei

    (School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China)

  • Yong Wang

    (School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China)

  • Xiaofang Deng

    (School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China
    State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China
    School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China)

Abstract

In the distributed storage system, when data need to be recovered after node failure, the erasure code redundancy method occupies less storage space than the multi-copy method. At present, the repair mechanism using erasure code to reconstruct the failed node only considers the improvement of link bandwidth on the repair rate and does not consider the impact of the selection of data providing node-set on the repair performance. A single node fault data reconstruction method based on the Software Defined Network (SDN) using the erasure code method is designed to solve the above problems. This method collects the network link-state through SDN, establishes a multi-attribute decision-making model of the data providing node-set based on the node performance, and determines the data providing nodes participating in providing data through the ideal point method. Then, the data recovery problem of a single fault node is modeled as the optimization problem of an optimal repair tree, and a hybrid genetic algorithm is designed to solve it. The experimental results show that under the same erasure code scale, after selecting the nodes of the data providing node-set, compared with the traditional tree topology and star topology, the repair delay distribution of the designed single fault node repair method for a distributed storage system is reduced by 15% and 45% respectively, and the repair flow is close to the star topology, which is reduced by 40% compared with the traditional tree repair.

Suggested Citation

  • Miao Ye & Qinghao Zhang & Ruoyu Wei & Yong Wang & Xiaofang Deng, 2022. "A New Method for Reconstructing Data Considering the Factor of Selected Provider Nodes Set in Distributed Storage System," Mathematics, MDPI, vol. 10(10), pages 1-22, May.
    • Handle: RePEc:gam:jmathe:v:10:y:2022:i:10:p:1739-:d:819086
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