Patents by Inventor Ellen Joanne Grusy

Ellen Joanne Grusy 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).

  • Management of point-in-time copy relationship for extent space efficient volumes
    Patent number: 9063883
    Abstract: A storage controller receives a request to establish a point-in-time copy operation by placing a space efficient source volume in a point-in-time copy relationship with a space efficient target volume, wherein subsequent to being established the point-in-time copy operation is configurable to consistently copy the space efficient source volume to the space efficient target volume at a point in time. A determination is made as to whether any track of an extent is staging into a cache from the space efficient target volume or destaging from the cache to the space efficient target volume. In response to a determination that at least one track of the extent is staging into the cache from the space efficient target volume or destaging from the cache to the space efficient target volume, release of the extent from the space efficient target volume is avoided.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: June 23, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Theresa M. Brown, Ellen Joanne Grusy, Lokesh M. Gupta, Brian D. Hatfield, Kurt A. Lovrien, Carol S. Mellgren, Raul E. Saba
  • MANAGEMENT OF POINT-IN-TIME COPY RELATIONSHIP FOR EXTENT SPACE EFFICIENT VOLUMES
    Publication number: 20130080704
    Abstract: A storage controller receives a request to establish a point-in-time copy operation by placing a space efficient source volume in a point-in-time copy relationship with a space efficient target volume, wherein subsequent to being established the point-in-time copy operation is configurable to consistently copy the space efficient source volume to the space efficient target volume at a point in time. A determination is made as to whether any track of an extent is staging into a cache from the space efficient target volume or destaging from the cache to the space efficient target volume. In response to a determination that at least one track of the extent is staging into the cache from the space efficient target volume or destaging from the cache to the space efficient target volume, release of the extent from the space efficient target volume is avoided.
    Type: Application
    Filed: September 26, 2011
    Publication date: March 28, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Theresa M. Brown, Ellen Joanne Grusy, Lokesh M. Gupta, Brian D. Hatfield, Kurt A. Lovrien, Carol S. Mellgren, Raul E. Saba