Patents by Inventor Rajiv Gamani WICKREMESINGHE

Rajiv Gamani WICKREMESINGHE 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 to retain and reclaim resource locks and client states after server failures
    Patent number: 10049022
    Abstract: A method, system, and computer program for high-availability database systems. The method commences by replicating (e.g., from a first server to a second server) a data structure having entries describing resource locks and client states. The replication can be performed to any number of servers. Upon detecting a failure of a connection between the first server and a client to which the first server is connected, the system establishes a new connection between the second server and the client by updating the replicated data structure to describe new connection between the second server and the client and updating the entries of the replicated data structure to reflect the new connection and the then current aspects of the resource locks and client states. The client can be a database instance, and the act of replicating can be accomplished using a broadcast channel. The servers can be organized in a computing cluster.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: August 14, 2018
    Assignee: Oracle International Corporation
    Inventors: Rajiv Gamani Wickremesinghe, Harish Nandyala, Prasad V. Bagal, Richard Lawrence Long, Shie-rei Huang, Dungara Ram Choudhary
  • SYSTEMS AND METHODS TO RETAIN AND RECLAIM RESOURCE LOCKS AND CLIENT STATES AFTER SERVER FAILURES
    Publication number: 20140379645
    Abstract: A method, system, and computer program for high-availability database systems. The method commences by replicating (e.g., from a first server to a second server) a data structure having entries describing resource locks and client states. The replication can be performed to any number of servers. Upon detecting a failure of a connection between the first server and a client to which the first server is connected, the system establishes a new connection between the second server and the client by updating the replicated data structure to describe new connection between the second server and the client and updating the entries of the replicated data structure to reflect the new connection and the then current aspects of the resource locks and client states. The client can be a database instance, and the act of replicating can be accomplished using a broadcast channel. The servers can be organized in a computing cluster.
    Type: Application
    Filed: June 24, 2013
    Publication date: December 25, 2014
    Applicant: Oracle International Corporation
    Inventors: Rajiv Gamani WICKREMESINGHE, Harish NANDYALA, Prasad V. BAGAL, Rich Lawrence LONG, Shie-rei HUANG, Dungara Ram CHOUDHARY