Patents by Inventor Richard T. Dalzell

Richard T. Dalzell 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).

  • Resiliency with a destination volume in a replication environment
    Patent number: 9015433
    Abstract: A method to provide resiliency with a destination volume in a replication environment is disclosed. Data from a source volume, such as a primary volume or a secondary volume in a replication relationship, is migrated to the destination volume. A snapshot representing data on a source volume is generated. The replication relationship between the source volumes is broken, and a new relationship between a source volume and the destination volume is established. A delta of data between the snapshot and one of the volumes in the new relationship is generated. The delta is sent to the other of the volumes in the new relationship.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: April 21, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jonathan Andrew McDowell, Siamak Nazari, Richard T. Dalzell
  • Host based write ordering for asynchronous replication
    Patent number: 8667236
    Abstract: A host write based write ordering mechanism is used so the write ordering on the secondary system is derived from the write ordering applied by the host to the primary system. In this scheme any set of writes that was issued in parallel on the primary system may also be issued in parallel on the secondary system. The parallel writes provide better performance compared to absolute or strict write ordering allowing only one outstanding write per volume group.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: March 4, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Adam M. Phelps, Richard T. Dalzell, Hariprasad Mankude Bhasker Rao
  • RESILIENCY WITH A DESTINATION VOLUME IN A REPLICATION ENVIRONMENT
    Publication number: 20140040574
    Abstract: A method to provide resiliency with a destination volume in a replication environment is disclosed. Data from a source volume, such as a primary volume or a secondary volume in a replication relationship, is migrated to the destination volume. A snapshot representing data on a source volume is generated. The replication relationship between the source volumes is broken, and a new relationship between a source volume and the destination volume is established. A delta of data between the snapshot and one of the volumes in the new relationship is generated. The delta is sent to the other of the volumes in the new relationship.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Inventors: Jonathan Andrew McDowell, Siamak Nazari, Richard T. Dalzell
  • Host Based Write Ordering for Asynchronous Replication
    Publication number: 20120079222
    Abstract: A host write based write ordering mechanism is used so the write ordering on the secondary system is derived from the write ordering applied by the host to the primary system. In this scheme any set of writes that was issued in parallel on the primary system may also be issued in parallel on the secondary system. The parallel writes provide better performance compared to absolute or strict write ordering allowing only one outstanding write per volume group.
    Type: Application
    Filed: September 29, 2010
    Publication date: March 29, 2012
    Applicant: 3PAR, INC.
    Inventors: Adam M. Phelps, Richard T. Dalzell, Hariprasad Mankude Bhasker Rao