Optimization of storage quota based on user's usage distribution

Yoshiaki Kasahara, Takuya Kawatani, Eisuke Ito, Koichi Simozono, Naomi Fujimura

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    To prevent shortage of storage space in a service system, an administrator usually set per-user quota as an upper limit of usable space for each user. To avoid service failure caused by resource exhaustion, the administrator tends to set a conservative quota value such as the storage capacity divided by the expected maximum number of users. In this research, we analyzed long-term storage usage history of our email system and file sharing system in Kyushu University. Mostly through the analyzed period, the usage pattern showed a long-tailed distribution similar to log-normal distribution. Also the overall storage consumption slowly increased during the analyzed period. Based on these analysis, we defined 'storage utilization ratio' to evaluate how the storage was effectively used. By approximating a storage utilization pattern as a power-law distribution, we proposed a method to calculate the optimal quota value to maximize the utilization ratio.

    Original languageEnglish
    Title of host publicationProceedings - 2015 IEEE 39th Annual Computer Software and Applications Conference Workshops, COMPSACW 2015
    EditorsSheikh Iqbal Ahamed, Carl K. Chang, Ivica Crnkovic, Pao-Ann Hsiung, Jingwei Yang, Gang Huang, William Chu
    PublisherIEEE Computer Society
    Pages149-154
    Number of pages6
    ISBN (Electronic)9781467365635
    DOIs
    Publication statusPublished - Sep 21 2015
    Event39th IEEE Annual Computer Software and Applications Conference Workshops, COMPSACW 2015 - Taichung, Taiwan, Province of China
    Duration: Jul 1 2015Jul 5 2015

    Publication series

    NameProceedings - International Computer Software and Applications Conference
    Volume3
    ISSN (Print)0730-3157

    Other

    Other39th IEEE Annual Computer Software and Applications Conference Workshops, COMPSACW 2015
    CountryTaiwan, Province of China
    CityTaichung
    Period7/1/157/5/15

    All Science Journal Classification (ASJC) codes

    • Software
    • Computer Science Applications

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