Patents by Inventor Shenggang WAN

Shenggang WAN 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).

  • Method for scheduling high speed cache of asymmetric disk array
    Patent number: 9626247
    Abstract: A method for asymmetrically scheduling buffer cache of disk array. The method including: (1) detecting whether access from a upper layer is hit in a buffer cache, proceeding to (7) if yes, and proceeding to (2) if no; (2) detecting whether the buffer cache is full, proceeding to (3) if yes, and proceeding to (5) if no; (3) detecting whether the number of pages of a sacrificial disk is greater than a threshold, proceeding to (4) if yes, and proceeding to (6) if no; (4) selecting and replacing a cold page of the sacrificial disk; (5) buffering data requested by a user in a blank page in the buffer cache; (6) selecting and replacing all cold pages of the buffer cache; and (7) reading or writing the data, and changing positions or status thereof in pages of the buffer cache.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: April 18, 2017
    Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHONLOGY
    Inventors: Qiang Cao, Shenggang Wan, Si Wu, Changsheng Xie
  • METHOD FOR SCHEDULING HIGH SPEED CACHE OF ASYMMETRIC DISK ARRAY
    Publication number: 20160147601
    Abstract: A method for asymmetrically scheduling buffer cache of disk array. The method including: (1) detecting whether access from a upper layer is hit in a buffer cache, proceeding to (7) if yes, and proceeding to (2) if no; (2) detecting whether the buffer cache is full, proceeding to (3) if yes, and proceeding to (5) if no; (3) detecting whether the number of pages of a sacrificial disk is greater than a threshold, proceeding to (4) if yes, and proceeding to (6) if no; (4) selecting and replacing a cold page of the sacrificial disk; (5) buffering data requested by a user in a blank page in the buffer cache; (6) selecting and replacing all cold pages of the buffer cache; and (7) reading or writing the data, and changing positions or status thereof in pages of the buffer cache.
    Type: Application
    Filed: June 23, 2015
    Publication date: May 26, 2016
    Inventors: Qiang CAO, Shenggang WAN, Si WU, Changsheng XIE