Patents by Inventor Glenn P. Steffler

Glenn P. Steffler 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).

  • Relaxing transaction serializability with statement-based data replication
    Patent number: 9990225
    Abstract: Consistency of replicated data copies with statement-based replication is provided without requiring transaction serializability. At a subordinate replication node, a transaction start message, replicated data modification statements, and a transaction commit message are received for a next committed transaction from a master replication node, wherein the transaction start message carries a master transaction identifier, an invisibility list consisting of identifiers of other master transactions that had started and not yet committed when this master transaction started, and an earliest invisible master transaction identifier. The master transaction identifier, invisibility list, and earliest invisible transaction identifier are mapped to subordinate transaction identifiers to preserve an order of transaction identifiers from the master replication node.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: June 5, 2018
    Assignee: International Business Machines Corporation
    Inventors: Thomas P. Boldt, Sunil K. Sarin, Dirk A. Seelemann, II, Glenn P. Steffler
  • Relaxing transaction serializability with statement-based data replication
    Patent number: 9990224
    Abstract: Consistency of replicated data copies with statement-based replication is provided without requiring transaction serializability. At a subordinate replication node, a transaction start message, replicated data modification statements, and a transaction commit message are received for a next committed transaction from a master replication node, wherein the transaction start message carries a master transaction identifier, an invisibility list consisting of identifiers of other master transactions that had started and not yet committed when this master transaction started, and an earliest invisible master transaction identifier. The master transaction identifier, invisibility list, and earliest invisible transaction identifier are mapped to subordinate transaction identifiers to preserve an order of transaction identifiers from the master replication node.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: June 5, 2018
    Assignee: International Business Machines Corporation
    Inventors: Thomas P. Boldt, Sunil K. Sarin, Dirk A. Seelemann, II, Glenn P. Steffler
  • RELAXING TRANSACTION SERIALIZABILITY WITH STATEMENT-BASED DATA REPLICATION
    Publication number: 20160246864
    Abstract: Consistency of replicated data copies with statement-based replication is provided without requiring transaction serializability. At a subordinate replication node, a transaction start message, replicated data modification statements, and a transaction commit message are received for a next committed transaction from a master replication node, wherein the transaction start message carries a master transaction identifier, an invisibility list consisting of identifiers of other master transactions that had started and not yet committed when this master transaction started, and an earliest invisible master transaction identifier. The master transaction identifier, invisibility list, and earliest invisible transaction identifier are mapped to subordinate transaction identifiers to preserve an order of transaction identifiers from the master replication node.
    Type: Application
    Filed: April 24, 2015
    Publication date: August 25, 2016
    Inventors: Thomas P. Boldt, Sunil K. Sarin, Dirk A. Seelemann, II, Glenn P. Steffler
  • RELAXING TRANSACTION SERIALIZABILITY WITH STATEMENT-BASED DATA REPLICATION
    Publication number: 20160246836
    Abstract: Consistency of replicated data copies with statement-based replication is provided without requiring transaction serializability. At a subordinate replication node, a transaction start message, replicated data modification statements, and a transaction commit message are received for a next committed transaction from a master replication node, wherein the transaction start message carries a master transaction identifier, an invisibility list consisting of identifiers of other master transactions that had started and not yet committed when this master transaction started, and an earliest invisible master transaction identifier. The master transaction identifier, invisibility list, and earliest invisible transaction identifier are mapped to subordinate transaction identifiers to preserve an order of transaction identifiers from the master replication node.
    Type: Application
    Filed: February 23, 2015
    Publication date: August 25, 2016
    Inventors: Thomas P. Boldt, Sunil K. Sarin, Dirk A. Seelemann, II, Glenn P. Steffler