Patents by Inventor John B. McEwan

John B. McEwan 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).

  • Methods and apparatus for implementing a high availability fibre channel switch
    Patent number: 7293105
    Abstract: High availability for a fibre channel switch in a storage area network can be implemented using redundant supervisors. An active supervisor can identify high availability characteristics associated with a message and determine whether the message should be mirrored onto a redundant supervisor, logged, and/or made persistent. Messages can be logged in a pending transaction buffer and stored using persistent storage services. Mirroring can be performed using synchronization queues that allow messages to be passed asynchronously to a redundant supervisor while maintaining full synchronization between supervisors and causing little delay to operation of the active supervisor.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: November 6, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: Marco Di Benedetto, John B. McEwan, Ramana Mellacheruvu, Umesh Mahajan
  • Methods and apparatus for implementing a high availability fibre channel switch
    Publication number: 20030135642
    Abstract: High availability for a fibre channel switch in a storage area network can be implemented using redundant supervisors. An active supervisor can identify high availability characteristics associated with a message and determine whether the message should be mirrored onto a redundant supervisor, logged, and/or made persistent. Messages can be logged in a pending transaction buffer and stored using persistent storage services. Mirroring can be performed using synchronization queues that allow messages to be passed asynchronously to a redundant supervisor while maintaining full synchronization between supervisors and causing little delay to operation of the active supervisor.
    Type: Application
    Filed: December 21, 2001
    Publication date: July 17, 2003
    Applicant: Andiamo Systems, Inc.
    Inventors: Marco Di Benedetto, John B. McEwan, Ramana Mellacheruvu, Umesh Mahajan