Patents by Inventor Yat O. Lau

Yat O. Lau 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).

  • Patent number: 10255343
    Abstract: Techniques for initializing a connection in a peer-to-peer replication environment. Responsive to a request to add a target node to a data replication group, embodiments receive a first message, at a target node, from an initiator node within the data replication group, indicating that the initiator node will begin replicating changes to the target node without waiting for any acknowledgements relating to the first message. The changes are applied to a first instance of a data entity on the initiator node. A second message is transmitted, from the target node, to at least one other member in the data replication group, announcing that the target node is joining the data replication group. Embodiments receive a plurality of replicated changes, at the target node, from the initiator node, and process each replicated change in the plurality of replicated changes against a second instance of the data entity at the target node.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: April 9, 2019
    Assignee: International Business Machines Corporation
    Inventors: Serge Bourbonnais, Somil Kulkarni, Yat O. Lau
  • Patent number: 9734223
    Abstract: Techniques are disclosed to determine differences between a source table and a target table in a database environment, as being persistent or transient. A first set of differences between the source table and the target table is determined at a first point in time. A second set of differences between the source table and the target table is determined at a second point in time subsequent to the first point in time. At least one of a set of persistent differences and a set of transient differences is determined. The set of persistent differences includes a set intersection of the first and second sets of differences, the set intersection being filtered based on matching non-key values of the differences. The set of transient differences includes a relative complement of the second set of differences in the first set of differences.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: August 15, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Serge Bourbonnais, Yat O. Lau, Xiao Li, Jonathan W. Wierenga
  • Publication number: 20170039261
    Abstract: Techniques for initializing a connection in a peer-to-peer replication environment. Responsive to a request to add a target node to a data replication group, embodiments receive a first message, at a target node, from an initiator node within the data replication group, indicating that the initiator node will begin replicating changes to the target node without waiting for any acknowledgements relating to the first message. The changes are applied to a first instance of a data entity on the initiator node. A second message is transmitted, from the target node, to at least one other member in the data replication group, announcing that the target node is joining the data replication group. Embodiments receive a plurality of replicated changes, at the target node, from the initiator node, and process each replicated change in the plurality of replicated changes against a second instance of the data entity at the target node.
    Type: Application
    Filed: October 20, 2016
    Publication date: February 9, 2017
    Inventors: Serge BOURBONNAIS, Somil KULKARNI, Yat O. LAU
  • Patent number: 9529881
    Abstract: Techniques are disclosed to determine differences between a source table and a target table in a database environment, as being persistent or transient. A first set of differences between the source table and the target table is determined at a first point in time. A second set of differences between the source table and the target table is determined at a second point in time subsequent to the first point in time. At least one of a set of persistent differences and a set of transient differences is determined. The set of persistent differences includes a set intersection of the first and second sets of differences, the set intersection being filtered based on matching non-key values of the differences. The set of transient differences includes a relative complement of the second set of differences in the first set of differences.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: December 27, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Serge Bourbonnais, Yat O. Lau, Xiao Li, Jonathan W. Wierenga
  • Patent number: 9483541
    Abstract: Techniques for initializing a connection in a peer-to-peer database replication environment. A message is received from an initiator node, indicating that the initiator node will begin replicating changes made to a particular data entity. One or more replicated changes relating to the database entity are received from the initiator node. If an updated instance of the data entity does not currently exist on a target node then one or more load operations are performed to create the updated instance. The stored replicated changes may then be processed against the updated instance of the database entity.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: November 1, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Serge Bourbonnais, Somil Kulkarni, Yat O. Lau
  • Patent number: 9477738
    Abstract: Techniques for initializing a connection in a peer-to-peer database replication environment. A message is received from an initiator node, indicating that the initiator node will begin replicating changes made to a particular data entity. One or more replicated changes relating to the database entity are received from the initiator node. If an updated instance of the data entity does not currently exist on a target node then one or more load operations are performed to create the updated instance. The stored replicated changes may then be processed against the updated instance of the database entity.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: October 25, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Serge Bourbonnais, Somil Kulkarni, Yat O. Lau
  • Publication number: 20150081637
    Abstract: Techniques are disclosed to determine differences between a source table and a target table in a database environment, as being persistent or transient. A first set of differences between the source table and the target table is determined at a first point in time. A second set of differences between the source table and the target table is determined at a second point in time subsequent to the first point in time. At least one of a set of persistent differences and a set of transient differences is determined. The set of persistent differences includes a set intersection of the first and second sets of differences, the set intersection being filtered based on matching non-key values of the differences. The set of transient differences includes a relative complement of the second set of differences in the first set of differences.
    Type: Application
    Filed: June 25, 2014
    Publication date: March 19, 2015
    Inventors: Serge BOURBONNAIS, Yat O. LAU, Xiao LI, Jonathan W. WIERENGA
  • Publication number: 20140372374
    Abstract: Techniques are disclosed to determine differences between a source table and a target table in a database environment, as being persistent or transient. A first set of differences between the source table and the target table is determined at a first point in time. A second set of differences between the source table and the target table is determined at a second point in time subsequent to the first point in time. At least one of a set of persistent differences and a set of transient differences is determined. The set of persistent differences includes a set intersection of the first and second sets of differences, the set intersection being filtered based on matching non-key values of the differences. The set of transient differences includes a relative complement of the second set of differences in the first set of differences.
    Type: Application
    Filed: September 13, 2013
    Publication date: December 18, 2014
    Applicant: International Business Machines Corporation
    Inventors: Serge Bourbonnais, Yat O. Lau, Xiao Li, Jonathan W. Wierenga
  • Publication number: 20120284227
    Abstract: Techniques for initializing a connection in a peer-to-peer database replication environment. A message is received from an initiator node, indicating that the initiator node will begin replicating changes made to a particular data entity. One or more replicated changes relating to the database entity are received from the initiator node. If an updated instance of the data entity does not currently exist on a target node then one or more load operations are performed to create the updated instance. The stored replicated changes may then be processed against the updated instance of the database entity.
    Type: Application
    Filed: July 19, 2012
    Publication date: November 8, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Serge Bourbonnais, Somil Kulkarni, Yat O. Lau
  • Publication number: 20120023066
    Abstract: Techniques for initializing a connection in a peer-to-peer database replication environment. A message is received from an initiator node, indicating that the initiator node will begin replicating changes made to a particular data entity. One or more replicated changes relating to the database entity are received from the initiator node. If an updated instance of the data entity does not currently exist on a target node then one or more load operations are performed to create the updated instance. The stored replicated changes may then be processed against the updated instance of the database entity.
    Type: Application
    Filed: January 6, 2011
    Publication date: January 26, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Serge Bourbonnais, Somil Kulkarni, Yat O. Lau