Patents by Inventor Mark Dennehy

Mark Dennehy 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).

  • Generating database sequences in a replicated database environment
    Patent number: 10929425
    Abstract: Embodiments relate to generating database sequences in a replicated database environment. An aspect includes providing a group of nodes each hosting an instance of a replicated database, with one node in the group elected as a master node responsible for generating and distributing values for auto-generated values in a column or row of the replicated database. Another aspect includes dividing, by the master node, a sequence space of possible auto-generated values for the column or row into sub-ranges and assigning a sub-range to a particular node in the group of nodes. Another aspect includes distributing, by the master node, values of the assigned sub-range to a particular node of the group of nodes.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: February 23, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Mark Dennehy, Robert Mooney
  • Handling failed cluster members when replicating a database between clusters
    Patent number: 9940206
    Abstract: Data integrity is maintained during failed communications between a member node of a primary cluster and a backup cluster by assigning an assisting member node to run an assisting process that transmits data entered into the member node to the backup cluster. In this way, a replicated database is maintained during a partial communication failure between the primary cluster and the backup cluster.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: April 10, 2018
    Assignee: International Business Machines Corporation
    Inventors: Kirill Bogdanov, Mark Dennehy, Diarmuid Flynn, Bruce M. Jackson, Marzia Mura, Effi Ofer, Jason C. Young, Roger L. Q. Zheng, Yuke Zhuge
  • GENERATING DATABASE SEQUENCES IN A REPLICATED DATABASE ENVIRONMENT
    Publication number: 20180052900
    Abstract: Embodiments relate to generating database sequences in a replicated database environment. An aspect includes providing a group of nodes each hosting an instance of a replicated database, with one node in the group elected as a master node responsible for generating and distributing values for auto-generated values in a column or row of the replicated database. Another aspect includes dividing, by the master node, a sequence space of possible auto-generated values for the column or row into sub-ranges and assigning a sub-range to a particular node in the group of nodes. Another aspect includes distributing, by the master node, values of the assigned sub-range to a particular node of the group of nodes.
    Type: Application
    Filed: November 1, 2017
    Publication date: February 22, 2018
    Inventors: Mark Dennehy, Robert Mooney
  • Generating database sequences in a replicated database environment
    Patent number: 9846733
    Abstract: Embodiments relate to generating database sequences in a replicated database environment. An aspect includes providing a group of nodes each hosting an instance of a replicated database, with one node in the group elected as a master node responsible for generating and distributing values for auto-generated values in a column or row of the replicated database. Another aspect includes dividing, by the master node, a sequence space of possible auto-generated values for the column or row into sub-ranges and assigning a sub-range to a particular node in the group of nodes. Another aspect includes distributing, by the master node, values of the assigned sub-range to a particular node of the group of nodes.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: December 19, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Mark Dennehy, Robert Mooney
  • HANDLING FAILED CLUSTER MEMBERS WHEN REPLICATING A DATABASE BETWEEN CLUSTERS
    Publication number: 20160103740
    Abstract: Data integrity is maintained during failed communications between a member node of a primary cluster and a backup cluster by assigning an assisting member node to run an assisting process that transmits data entered into the member node to the backup cluster. In this way, a replicated database is maintained during a partial communication failure between the primary cluster and the backup cluster.
    Type: Application
    Filed: December 17, 2015
    Publication date: April 14, 2016
    Inventors: Kirill Bogdanov, Mark Dennehy, Diarmuid Flynn, Bruce M. Jackson, Marzia Mura, Effi Ofer, Jason C. Young, Roger L. Q. Zheng, Yuke Zhuge
  • Handling failed cluster members when replicating a database between clusters
    Patent number: 9251017
    Abstract: Data integrity is maintained during failed communications between a member node of a primary cluster and a backup cluster by assigning an assisting member node to run an assisting process that transmits data entered into the member node to the backup cluster. In this way, a replicated database is maintained during a partial communication failure between the primary cluster and the backup cluster.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: February 2, 2016
    Assignee: International Business Machines Corporation
    Inventors: Kirill Bogdanov, Mark Dennehy, Diarmuid Flynn, Bruce M. Jackson, Marzia Mura, Effi Ofer, Jason C. Young, Roger L. Q. Zheng, Yuke Zhuge
  • HANDLING FAILED CLUSTER MEMBERS WHEN REPLICATING A DATABASE BETWEEN CLUSTERS
    Publication number: 20150278039
    Abstract: Data integrity is maintained during failed communications between a member node of a primary cluster and a backup cluster by assigning an assisting member node to run an assisting process that transmits data entered into the member node to the backup cluster. In this way, a replicated database is maintained during a partial communication failure between the primary cluster and the backup cluster.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 1, 2015
    Applicant: International Business Machines Corporation
    Inventors: Kirill Bogdanov, Mark Dennehy, Diarmuid Flynn, Bruce M. Jackson, Marzia Mura, Effi Ofer, Jason C. Young, Roger L. Q. Zheng, Yuke Zhuge
  • GENERATING DATABASE SEQUENCES IN A REPLICATED DATABASE ENVIRONMENT
    Publication number: 20140025634
    Abstract: Embodiments relate to generating database sequences in a replicated database environment. An aspect includes providing a group of nodes each hosting an instance of a replicated database, with one node in the group elected as a master node responsible for generating and distributing values for auto-generated values in a column or row of the replicated database. Another aspect includes dividing, by the master node, a sequence space of possible auto-generated values for the column or row into sub-ranges and assigning a sub-range to a particular node in the group of nodes. Another aspect includes distributing, by the master node, values of the assigned sub-range to a particular node of the group of nodes.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 23, 2014
    Inventors: Mark Dennehy, Robert Mooney