Patents by Inventor Michael J. Declerck

Michael J. Declerck 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).

  • Metadata structures and related locking techniques to improve performance and scalability in a cluster file system
    Patent number: 7487228
    Abstract: A cluster file system is disclosed. A plurality of disk servers, operating as a single distributed disk server layer, are connected to the one or more physical disks. Each disk server stores metadata for each of the files. A plurality of lock servers, having one or more locks for each file and associated file system metadata operates as a single centralized distributed lock server to coordinate access to the files stored by the disk server layer. A plurality of asynchronous file servers, operating as a single distributed file server layer in response to a request for a file from a user program: (i) retrieves the requested file from the disk server layer and at least one lock, associated with the retrieved file, from the lock server, and (ii) retrieves metadata for at least one file that is related to the requested files, and at least one lock, for each file that has had its metadata retrieved.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: February 3, 2009
    Assignee: Red Hat, Inc.
    Inventors: Kenneth Preslan, Michael J. Declerck, Matthew O'Keefe
  • Distributed file system using disk servers, lock servers and file servers
    Patent number: 7406473
    Abstract: A distributed file system is disclosed. A plurality of disk servers, operating as a single distributed disk server layer, are connected to the one or more physical disks. Each disk server stores meta-data for each of the files. A plurality of lock servers, having one or more locks for each file operates as a single distributed lock server to coordinate access to the files stored by the disk server layer. A plurality of asynchronous file servers, operating as a single distributed file server layer in response to a request for a file from a user program: (i) retrieves the requested file from the disk server layer and at least one lock, associated with the retrieved file, from the lock server, and (ii) retrieves meta-data for at least one file that is related to the requested files, and at least one lock, for each file that has had its meta-data retrieved.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: July 29, 2008
    Assignee: Red Hat, Inc.
    Inventors: Jonathan Brassow, Michael J. Declerck, Andrew Lewis, Adam Manthei, Matthew O'Keefe, Kenneth Preslan, David Teigland