Patents by Inventor Matthew S. Johnston

Matthew S. Johnston 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).

  • Efficient detection of available space in a file system space map
    Patent number: 10915503
    Abstract: A space allocator in a file management system maintains and uses one or more offsets and a stored value of the largest space skipped on previous scans to increase the efficiency of scans for available space in a file system space map. When the space allocator determines a current allocation request is greater than the largest space skipped in the previous scan, a last allocated offset can be used to begin scanning to reduce the portion of the map to scan in order to find available space. When the space allocator determines the current allocation request is less than or equal to the largest space skipped in the previous scan, a first available offset can be used to begin scanning for an appropriate unused space.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: February 9, 2021
    Assignee: International Business Machines Corporation
    Inventors: Matthew S. Johnston, James L. Tilbury
  • EFFICIENT DETECTION OF AVAILABLE SPACE IN A FILE SYSTEM SPACE MAP
    Publication number: 20200174971
    Abstract: A space allocator in a file management system maintains and uses one or more offsets and a stored value of the largest space skipped on previous scans to increase the efficiency of scans for available space in a file system space map. When the space allocator determines a current allocation request is greater than the largest space skipped in the previous scan, a last allocated offset can be used to begin scanning to reduce the portion of the map to scan in order to find available space. When the space allocator determines the current allocation request is less than or equal to the largest space skipped in the previous scan, a first available offset can be used to begin scanning for an appropriate unused space.
    Type: Application
    Filed: November 29, 2018
    Publication date: June 4, 2020
    Inventors: Matthew S. Johnston, James L. Tilbury