A hybrid storage system composed of on-the-fly automated storage tiering (OTF-AST) and caching

Kazuichi Oe, Koji Okamura

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

    3 Citations (Scopus)

    Abstract

    In a previous workload study, we found a new type of I/O concentration approximately 6 GB in size that continues for more than 10 minutes and then moves on to another area. We also found that the conventional hybrid storage method, static tiering and caching, is not sufficient for this I/O concentration. The on-the-fly automated storage tiering (OTF-AST) designed for this I/O concentration cannot handle other I/O concentrations well, so we have developed a hybrid storage system composed of both OTF-AST and caching. In the proposed system, the OTF-AST dynamically migrates the new I/O concentration to SSD and the caching handles the other I/O concentrations. Experimental results showed that the hybrid storage system surpasses the basic OTF-AST system with an average response time 27% better for one of a typical samba workload in which read is not predominant and I/O concentration lasts for 20 minutes.

    Original languageEnglish
    Title of host publicationProceedings - 2014 2nd International Symposium on Computing and Networking, CANDAR 2014
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages406-411
    Number of pages6
    ISBN (Electronic)9781479941520
    DOIs
    Publication statusPublished - Feb 27 2015
    Event2nd International Symposium on Computing and Networking, CANDAR 2014 - Shizuoka, Japan
    Duration: Dec 10 2014Dec 12 2014

    Other

    Other2nd International Symposium on Computing and Networking, CANDAR 2014
    CountryJapan
    CityShizuoka
    Period12/10/1412/12/14

    All Science Journal Classification (ASJC) codes

    • Computer Networks and Communications

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