Patents by Inventor John H. Hugg

John H. Hugg 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).

  • Methods and systems for detecting data divergence and inconsistency across replicas of data within a shared-nothing distributed database
    Patent number: 9600514
    Abstract: Methods and systems are disclosed for detecting data divergence or inconsistency across replicas of data maintained in replica nodes in a shared-nothing distributed computer database system. The replica nodes communicate with a coordinator node over a computer network. The method includes the steps of: (a) receiving an operation at the coordinator node; (b) transmitting the operation to the replica nodes to be executed by each replica node to generate an operation result and a hash representation of the operation or of the operation result; (c) receiving the operation result and the hash representation generated by each of the replica nodes; and (d) determining whether the operation resulted in data divergence or inconsistency by detecting when the hash representations received from the replica nodes are not all the same.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: March 21, 2017
    Assignee: VOLTDB, INC.
    Inventor: John H. Hugg
  • METHODS AND SYSTEMS FOR DETECTING DATA DIVERGENCE AND INCONSISTENCY ACROSS REPLICAS OF DATA WITHIN A SHARED-NOTHING DISTRIBUTED DATABASE
    Publication number: 20150074063
    Abstract: Methods and systems are disclosed for detecting data divergence or inconsistency across replicas of data maintained in replica nodes in a shared-nothing distributed computer database system. The replica nodes communicate with a coordinator node over a computer network. The method includes the steps of: (a) receiving an operation at the coordinator node; (b) transmitting the operation to the replica nodes to be executed by each replica node to generate an operation result and a hash representation of the operation or of the operation result; (c) receiving the operation result and the hash representation generated by each of the replica nodes; and (d) determining whether the operation resulted in data divergence or inconsistency by detecting when the hash representations received from the replica nodes are not all the same.
    Type: Application
    Filed: September 8, 2014
    Publication date: March 12, 2015
    Applicant: VoltDB, Inc.
    Inventor: John H. Hugg