Patents by Inventor Clifford W. Johnson

Clifford W. Johnson 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).

  • Systems and methods for managing distributed database resources
    Patent number: 7162467
    Abstract: A system and method are described for implementing a distributed database caching system with the capability to support and accelerate read and update transactions to and from one or more central Database Management System (DBMS) servers for multiple concurrent users. The system and method include a resource abstraction layer in a database client driver in communication with remote server units (RSUs) having a cache database. RSUs respond to user requests using the cache database if possible. If the cache database does not have the needed data, the RSU sends the request to a database subscription manager (DSM) in communication with the DBMS server. The DSM responds to the request and sends predicate data based on queries processed by the DBMS server for use in updating the cache databases.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: January 9, 2007
    Assignee: Greenplum, Inc.
    Inventors: John Eshleman, Clifford W. Johnson, Luke Lonergan
  • Systems and methods for managing distributed database resources
    Publication number: 20020116457
    Abstract: A system and method are described for implementing a distributed database caching system with the capability to support and accelerate read and update transactions to and from one or more central Database Management System (DBMS) servers for multiple concurrent users. The system and method include a resource abstraction layer in a database client driver in communication with remote server units (RSUs) having a cache database. RSUs respond to user requests using the cache database if possible. If the cache database does not have the needed data, the RSU sends the request to a database subscription manager (DSM) in communication with the DBMS server. The DSM responds to the request and sends predicate data based on queries processed by the DBMS server for use in updating the cache databases.
    Type: Application
    Filed: February 21, 2002
    Publication date: August 22, 2002
    Inventors: John Eshleman, Clifford W. Johnson, Luke Lonergan