Patents by Inventor YU-HAN CHOU

YU-HAN CHOU 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).

  • Providing consistent database recovery after database failure for distributed databases with non-durable storage leveraging background synchronization point
    Patent number: 11188516
    Abstract: An approach for consistent database recovery for distributed database systems uses “synchronization points”. A synchronization point is a global timestamp for which across all nodes of a distributed database system, the nodes have stored change records for any transaction occurring at and before the synchronization point in persistent logs. Each node may employ asynchronous flushing. However, on a periodic basis, each node coordinates to establish a synchronization point, which may entail ensuring change records for transactions that committed at or before the synchronization point are stored in persistent logs. In effect, a synchronization point represents that any transaction committed at or before the synchronization point has been durably committed.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: November 30, 2021
    Assignee: Oracle International Corproation
    Inventors: Derek Taylor, Chi-Kim Hoang, Yu-Han Chou, Varadarajan Aravamudhan
  • PROVIDING CONSISTENT DATABASE RECOVERY AFTER DATABASE FAILURE FOR DISTRIBUTED DATABASES WITH NON-DURABLE STORAGE LEVERAGING BACKGROUND SYNCHRONIZATION POINT
    Publication number: 20200065297
    Abstract: An approach for consistent database recovery for distributed database systems uses “synchronization points”. A synchronization point is a global timestamp for which across all nodes of a distributed database system, the nodes have stored change records for any transaction occurring at and before the synchronization point in persistent logs. Each node may employ asynchronous flushing. However, on a periodic basis, each node coordinates to establish a synchronization point, which may entail ensuring change records for transactions that committed at or before the synchronization point are stored in persistent logs. In effect, a synchronization point represents that any transaction committed at or before the synchronization point has been durably committed.
    Type: Application
    Filed: July 25, 2019
    Publication date: February 27, 2020
    Inventors: DEREK TAYLOR, CHI-KIM HOANG, YU-HAN CHOU, VARADARAJAN ARAVAMUDHAN