Patents by Inventor Tomas Ulin

Tomas Ulin 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).

  • Composite hash and list partitioning of database tables
    Patent number: 8078825
    Abstract: A method for partitioning during an online node add. The method includes providing a data storage cluster with first and second nodes, and storing a table of data in the data storage cluster with a first partition storing a set of rows or data elements in the first node and a second partition storing a set of rows or data elements in the second node. The method includes adding a third node to the cluster and adding a third partition to the table using a partitioning mechanism to create a distribution mapping for data elements in the first, second, and third partitions. The distribution mapping provides substantially uniform distribution of the data elements over the first, second, and third partitions by the partitioning mechanism using modulo hash partitioning as a function of data elements or by combining hash and list partitioning such that data is retained on the original partitions.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: December 13, 2011
    Assignee: Oracle America, Inc.
    Inventors: Jonas Oreland, Frazer Clement, Tomas Ulin
  • COMPOSITE HASH AND LIST PARTITIONING OF DATABASE TABLES
    Publication number: 20100235606
    Abstract: A method for partitioning during an online node add. The method includes providing a data storage cluster with first and second nodes, and storing a table of data in the data storage cluster with a first partition storing a set of rows or data elements in the first node and a second partition storing a set of rows or data elements in the second node. The method includes adding a third node to the cluster and adding a third partition to the table using a partitioning mechanism to create a distribution mapping for data elements in the first, second, and third partitions. The distribution mapping provides substantially uniform distribution of the data elements over the first, second, and third partitions by the partitioning mechanism using modulo hash partitioning as a function of data elements or by combining hash and list partitioning such that data is retained on the original partitions.
    Type: Application
    Filed: March 11, 2009
    Publication date: September 16, 2010
    Applicant: Oracle America, Inc.
    Inventors: Jonas Oreland, Frazer Clement, Tomas Ulin