Patents by Inventor Douglas Ledden

Douglas Ledden 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 use of peer cache space in large scale file distributions
    Patent number: 8219632
    Abstract: A mechanism for providing efficient use of peer cache space in large scale file distributions. A peer computer receives a download plan for a requested file. The download plan specifies a number of peer servers where the file is stored, a minimum number of peer servers required to store the file, and a saturation level for the file in the zone. When the peer computer downloads the file from one or more peer servers listed in the download plan, the peer computer determines whether the file is required to be cached at the peer computer by comparing the minimum number of peer servers in the plan required to store the file against the number of peer servers listed in the plan. If the minimum number required to store the file is greater the number of peer servers listed in the plan, the peer computer caches the file.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: July 10, 2012
    Assignee: International Business Machines Corporation
    Inventors: Steven Armand Jarvis, Douglas Ledden, Liliana Orozco, Brian George Vassberg
  • Efficient Use of Peer Cache Space In Large Scale File Distributions
    Publication number: 20100306252
    Abstract: A mechanism for providing efficient use of peer cache space in large scale file distributions. A peer computer receives a download plan for a requested file. The download plan specifies a number of peer servers where the file is stored, a minimum number of peer servers required to store the file, and a saturation level for the file in the zone. When the peer computer downloads the file from one or more peer servers listed in the download plan, the peer computer determines whether the file is required to be cached at the peer computer by comparing the minimum number of peer servers in the plan required to store the file against the number of peer servers listed in the plan. If the minimum number required to store the file is greater the number of peer servers listed in the plan, the peer computer caches the file.
    Type: Application
    Filed: May 27, 2009
    Publication date: December 2, 2010
    Applicant: International Business Machines Corporation
    Inventors: STEVEN A. JARVIS, DOUGLAS LEDDEN, LILIANA OROZCO, BRIAN G. VASSBERG