Patents by Inventor Kazutoshi Mio

Kazutoshi Mio has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus to reduce a data-migration time for rearranging data between storage hierarchical layers
    Patent number: 10606503
    Abstract: In a state where one of physical storage regions is allocated to each of unit regions included in a logical storage region, an apparatus identifies, from among the unit regions, first unit regions which have been allocated from physical storage regions whose allocations to the first unit regions are to be changed. The apparatus sequentially selects, from among the first unit regions, a second unit region as a candidate for data migration, and instructs data migration of the second unit region between the physical storage regions. The apparatus determines whether data migration of any one of the unit regions whose data has been instructed to be migrated is being executed on each of multiple divided regions obtained by dividing a physical storage region to which data of the second unit region is to be migrated, and instructs data migration of the second unit region based on the determination.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: March 31, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Kazutoshi Mio, Tomoaki Abe
  • APPARATUS TO REDUCE A DATA-MIGRATION TIME FOR REARRANGING DATA BETWEEN STORAGE HIERARCHICAL LAYERS
    Publication number: 20190220214
    Abstract: In a state where one of physical storage regions is allocated to each of unit regions included in a logical storage region, an apparatus identifies, from among the unit regions, first unit regions which have been allocated from physical storage regions whose allocations to the first unit regions are to be changed. The apparatus sequentially selects, from among the first unit regions, a second unit region as a candidate for data migration, and instructs data migration of the second unit region between the physical storage regions. The apparatus determines whether data migration of any one of the unit regions whose data has been instructed to be migrated is being executed on each of multiple divided regions obtained by dividing a physical storage region to which data of the second unit region is to be migrated, and instructs data migration of the second unit region based on the determination.
    Type: Application
    Filed: January 2, 2019
    Publication date: July 18, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Kazutoshi Mio, Tomoaki Abe