Patents by Inventor Leszek R Gryz

Leszek R Gryz 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).

  • Dynamically quantifying and improving the reliability of distributed data storage systems
    Patent number: 8019728
    Abstract: Data is stored in a distributed data storage system comprising a plurality of disks. When a disk fails, system reliability is restored by executing a set of reconstructions according to a schedule. System reliability is characterized by a dynamic Normalcy Deviation Score. The schedule for executing the set of reconstructions is determined by a minimum intersection policy. A set of reconstructions is received and divided into a set of queues rank-ordered by redundancy level ranging from a lowest redundancy level to a highest redundancy level. For reconstructions in each queue, an intersection matrix is calculated. Diskscores for each disk are calculated. The schedule for the set of reconstructions is based at least in part on the intersection matrices, the Normal Deviation Scores, and the diskscores.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: September 13, 2011
    Assignee: NEC Laboratories America, Inc.
    Inventors: Rekha N Bachwani, Leszek R Gryz, Ricardo G Bianchini, Cezary Dubnicki
  • Dynamically Quantifying and Improving the Reliability of Distributed Data Storage Systems
    Publication number: 20090265360
    Abstract: Data is stored in a distributed data storage system comprising a plurality of disks. When a disk fails, system reliability is restored by executing a set of reconstructions according to a schedule. System reliability is characterized by a dynamic Normalcy Deviation Score. The schedule for executing the set of reconstructions is determined by a minimum intersection policy. A set of reconstructions is received and divided into a set of queues rank-ordered by redundancy level ranging from a lowest redundancy level to a highest redundancy level. For reconstructions in each queue, an intersection matrix is calculated. Diskscores for each disk are calculated. The schedule for the set of reconstructions is based at least in part on the intersection matrices, the Normal Deviation Scores, and the diskscores.
    Type: Application
    Filed: March 4, 2009
    Publication date: October 22, 2009
    Applicant: NEC LABORATORIES AMERICA, INC.
    Inventors: Rekha N. Bachwani, Leszek R. Gryz, Ricardo G. Bianchini, Cezary Dubnicki