Patents by Inventor David K. Aha

David K. Aha 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).

  • Defragmentation techniques
    Patent number: 11157419
    Abstract: Techniques for processing data may include: receiving source physical storage allocation units that include valid data and one or more holes of unused physical storage, wherein each source physical storage allocation unit has an associated timestamp denoting a most recent destaging time of any data stored on the source physical storage allocation unit; determining an age for each source physical allocation unit based on the associated timestamp of the source physical allocation unit; for each source physical storage allocation unit, determining one of multiple age buckets for the source physical allocation unit based on the age of the source physical allocation unit; and for a first of the age buckets including two source physical allocation units, performing first processing including: relocating at least some valid data from the two source physical storage allocation units to a target physical storage allocation unit.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: October 26, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Anoop Raghunathan, Roman Gramc, Stephen M. Lathrop, David K. Aha, Christopher W. Appleby, Garret Bourke, Jeremy J. O'Hare
  • DEFRAGMENTATION TECHNIQUES
    Publication number: 20210271607
    Abstract: Techniques for processing data may include: receiving source physical storage allocation units that include valid data and one or more holes of unused physical storage, wherein each source physical storage allocation unit has an associated timestamp denoting a most recent destaging time of any data stored on the source physical storage allocation unit; determining an age for each source physical allocation unit based on the associated timestamp of the source physical allocation unit; for each source physical storage allocation unit, determining one of multiple age buckets for the source physical allocation unit based on the age of the source physical allocation unit; and for a first of the age buckets including two source physical allocation units, performing first processing including: relocating at least some valid data from the two source physical storage allocation units to a target physical storage allocation unit.
    Type: Application
    Filed: February 27, 2020
    Publication date: September 2, 2021
    Applicant: EMC IP Holding Company LLC
    Inventors: Anoop Raghunathan, Roman Gramc, Stephen M. Lathrop, David K. Aha, Christopher W. Appleby, Garret Bourke, Jeremy J. O'Hare