Patents by Inventor Darren P. Schack

Darren P. Schack 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).

  • Patent number: 8706755
    Abstract: A distributed file system enables the intelligent storing and retrieval of files among a plurality of storage units. The distributed file system utilizes a metadata data structure to track and manage detailed information about each file, including, for example, the device and block locations of the file's data blocks, to permit different levels of replication and/or redundancy. The distributed file system includes a switch to receive a read request for a file and to send the read request to one of the storage units. Each of the plurality of storage units is operable to monitor access to the file, such that a block cache module is operable to perform a scalable number of packet read aheads, wherein the scalable number is based on at least a current read rate and a current latency of a link to access the at least one file.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: April 22, 2014
    Assignee: EMC Corporation
    Inventors: Sujal M. Patel, Paul A. Mikesell, Darren P. Schack
  • Patent number: 8356013
    Abstract: In one embodiment, a user or client device is connected to a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. In an embodiment, a snapshot tracking data structure is maintained for efficient creation and deletion of the snapshot.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: January 15, 2013
    Assignee: EMC Corporation
    Inventors: Neal T. Fachan, Justin M. Husted, Eric M. Lemar, Darren P. Schack
  • Patent number: 8341431
    Abstract: A number of digital content rendering modules are equipped such that selective subsets of the modules may be employed to render digital content of different media, and of different format types. The modules are organized into a hierarchy, with a selected one occupying a root position of the hierarchy, to exclusively receive the digital contents to be rendered, and that each module is further responsible for verifying the integrity of its immediate downstream modules, to collectively protect the digital contents being rendered. Additionally, in accordance with another aspect, a tamper resistant module is employed to recover digital contents provided in a protected state, obfuscating the recovery. Further, the modules may be of different application domains.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: December 25, 2012
    Assignee: Intel Corporation
    Inventors: Jeffrey M. Ayars, Rahul Agarwal, Alain Hamel, Darren P. Schack
  • Patent number: 8286029
    Abstract: In some embodiments, storage devices, such as a storage drive or a storage node, in an array of storage devices may be reintroduced into the array of storage devices after a period of temporary unavailability without fully rebuilding the entire previously unavailable storage device.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: October 9, 2012
    Assignee: EMC Corporation
    Inventors: Robert J. Anderson, Neal T. Fachan, Peter J. Godman, Justin M. Husted, Aaron J. Passey, David W. Richards, Darren P. Schack
  • Patent number: 8214400
    Abstract: Systems and methods are disclosed that provide an indexing data structure. In one embodiment, the indexing data structure is mirrored index tree where the copies of the nodes of the tree are stored across devices in a distributed system. In one embodiment, nodes that are stored on an offline device are restored, and an offline device that comes back online is merged into the distributed system and given access to the current indexing data structure. In one embodiment, the indexing data structure is traversed to locate and restore nodes that are stored on offline devices of the distributed system.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: July 3, 2012
    Assignee: EMC Corporation
    Inventors: Neal T. Fachan, Aaron J. Passey, Darren P. Schack
  • Patent number: 8214334
    Abstract: Systems and methods are provided for scanning files and directories in a distributed file system on a network of nodes. The nodes include metadata with attribute information corresponding to files and directories distributed on the nodes. In one embodiment, the files and directories are scanned by commanding the nodes to search their respective metadata for a selected attribute. At least two of the nodes are capable of searching their respective metadata in parallel. In one embodiment, the distributed file system commands the nodes to search for metadata data structures having location information corresponding to a failed device on the network. The metadata data structures identified in the search may then be used to reconstruct lost data that was stored on the failed device.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: July 3, 2012
    Assignee: EMC Corporation
    Inventors: Paul A. Mikesell, Robert J. Anderson, Peter J. Godman, Darren P. Schack, Nathan E. Dire
  • Patent number: 8200632
    Abstract: In one embodiment, a user or client device communicates with a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. In some embodiments, systems and methods intelligently choose whether to use copy-on-write or point-in-time copy when saving data in a snapshot version of a file whose current version is being overwritten. In some embodiments, systems and methods allow snapshot users to return from a snapshot directory to the immediate parent directory from which the user entered into the snapshot.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: June 12, 2012
    Assignee: EMC Corporation
    Inventors: Darren P. Schack, Eric M. Lemar, Neal T. Fachan
  • Patent number: 8176013
    Abstract: Systems and methods are disclosed that provide an indexing data structure. In one embodiment, the indexing data structure is mirrored index tree where the copies of the nodes of the tree are stored across devices in a distributed system. In one embodiment, nodes that are stored on an offline device are restored, and an offline device that comes back online is merged into the distributed system and given access to the current indexing data structure. In one embodiment, the indexing data structure is traversed to locate and restore nodes that are stored on offline devices of the distributed system.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: May 8, 2012
    Assignee: EMC Corporation
    Inventors: Aaron J. Passey, Darren P. Schack, Peter J. Godman, Robert J. Anderson, Neal T. Fachan
  • Patent number: 8112395
    Abstract: The intelligent distributed file system enables the storing of file data among a plurality of smart storage units which are accessed as a single file system. The intelligent distributed file system utilizes a metadata data structure to track and manage detailed information about each file, including, for example, the device and block locations of the file's data blocks, to permit different levels of replication and/or redundancy within a single file system, to facilitate the change of redundancy parameters, to provide high-level protection for metadata, to replicate and move data in real-time, and so forth.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: February 7, 2012
    Assignee: EMC Corporation
    Inventors: Sujal M. Patel, Paul A. Mikesell, Darren P. Schack
  • Patent number: 8051425
    Abstract: Systems and methods are provided for reducing latency in distributed systems by executing commands as sufficient information and system resources become available. In one embodiment, commands in a transaction include dependency information and an execution engine is configured to execute the commands as the dependencies become satisfied. In some embodiments, the commands also include priority information. If sufficient resources are not available to execute two or more commands with satisfied dependencies, the execution engine determines an order for executing the commands based at least in part on the priority information. In one embodiment, time-intensive commands are assigned a higher priority than commands that are expected to take less time to execute.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: November 1, 2011
    Assignee: EMC Corporation
    Inventors: Peter J. Godman, Darren P. Schack
  • Patent number: 8015156
    Abstract: In one embodiment, a user or client device is connected to a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. According to one embodiment, the system stores representations of the snapshots that govern a file or directory and its descendants within metadata associated with that file or directory. In one embodiment, before modifying a file or directory, the system updates the representations of the governing snapshots by traversing the metadata of ancestors of the file or directory.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: September 6, 2011
    Assignee: EMC Corporation
    Inventors: Robert J. Anderson, Neal T. Fachan, Justin M. Husted, Eric M. Lemar, Aaron J. Passey, Darren P. Schack
  • Patent number: 8010493
    Abstract: In one embodiment, a user or client device is connected to a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. In one embodiment, the metadata comprises mini-snapshots for directories representing a path from the root of the file system to the root of the snapshot. The mini-snapshots serve as stand-ins for portions of the file system which are not included in the snapshot, but which permit access to the snapshot data in an intuitive way.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: August 30, 2011
    Assignee: EMC Corporation
    Inventors: Robert J. Anderson, Neal T. Fachan, Eric M. Lemar, Aaron J. Passey, David W. Richards, Darren P. Schack
  • Publication number: 20110145195
    Abstract: Systems and methods are disclosed that provide an indexing data structure. In one embodiment, the indexing data structure is mirrored index tree where the copies of the nodes of the tree are stored across devices in a distributed system. In one embodiment, nodes that are stored on an offline device are restored, and an offline device that comes back online is merged into the distributed system and given access to the current indexing data structure. In one embodiment, the indexing data structure is traversed to locate and restore nodes that are stored on offline devices of the distributed system.
    Type: Application
    Filed: December 10, 2010
    Publication date: June 16, 2011
    Applicant: ISILON SYSTEMS, INC.
    Inventors: Aaron J. Passey, Darren P. Schack, Peter J. Godman, Robert J. Anderson, Neal T. Fachan
  • Patent number: 7962779
    Abstract: The intelligent distributed file system enables the storing of file data among a plurality of smart storage units which are accessed as a single file system. The intelligent distributed file system utilizes a metadata data structure to track and manage detailed information about each file, including, for example, the device and block locations of the file's data blocks, to permit different levels of replication and/or redundancy within a single file system, to facilitate the change of redundancy parameters, to provide high-level protection for metadata, to replicate and move data in real-time, and to permit the creation of virtual hot spares among the smart storage units without the need to idle any single smart storage unit in the intelligent distributed file system.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: June 14, 2011
    Assignee: EMC Corporation
    Inventors: Sujal M Patel, Paul A Mikesell, Darren P Schack, Aaron J Passey
  • Patent number: 7953704
    Abstract: In one embodiment, a user or client device is connected to a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. According to one embodiment, the system stores and updates metadata, including a governance list, for each of the files and directories. The governance list provides a representation of the snapshots which govern a file or directory and its descendants.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: May 31, 2011
    Assignee: EMC Corporation
    Inventors: Robert J. Anderson, Neal T. Fachan, Eric M. Lemar, Aaron J. Passey, David W. Richards, Darren P. Schack
  • Patent number: 7949692
    Abstract: In one embodiment, a user or client device communicates with a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. In some embodiments, systems and methods intelligently choose whether to use copy-on-write or point-in-time copy when saving data in a snapshot version of a file whose current version is being overwritten. In some embodiments, systems and methods allow snapshot users to return from a snapshot directory to the immediate parent directory from which the user entered into the snapshot.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: May 24, 2011
    Assignee: EMC Corporation
    Inventors: Eric M. Lemar, Darren P. Schack, Neal T. Fachan
  • Publication number: 20110119234
    Abstract: In one embodiment, a user or client device communicates with a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. In some embodiments, systems and methods intelligently choose whether to use copy-on-write or point-in-time copy when saving data in a snapshot version of a file whose current version is being overwritten. In some embodiments, systems and methods allow snapshot users to return from a snapshot directory to the immediate parent directory from which the user entered into the snapshot.
    Type: Application
    Filed: January 14, 2011
    Publication date: May 19, 2011
    Inventors: Darren P. Schack, Eric M. Lemar, Neal T. Fachan
  • Patent number: 7937421
    Abstract: Systems and methods for restriping files distributed among a set of smart storage units, wherein data blocks for a particular stripe do not typically need to be located at any particular location on the storage units, wherein data can be typically restriped among the smart storage units with minimal data movement, and wherein data is typically protected and recoverable even if a system failure occurs during the restriping process.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: May 3, 2011
    Assignee: EMC Corporation
    Inventors: Paul A. Mikesell, Rob Anderson, Aaron James Passey, Peter John Godman, Hassan F. Khan, Darren P. Schack
  • Publication number: 20110087635
    Abstract: In one embodiment, a user or client device is connected to a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. In an embodiment, a snapshot tracking data structure is maintained for efficient creation and deletion of the snapshot.
    Type: Application
    Filed: December 17, 2010
    Publication date: April 14, 2011
    Applicant: Isilon Systems, Inc.
    Inventors: Neal T. Fachan, Justin M. Husted, Eric M. Lemar, Darren P. Schack
  • Patent number: 7917474
    Abstract: Systems and methods are disclosed that provide an indexing data structure. In one embodiment, the indexing data structure is mirrored index tree where the copies of the nodes of the tree are stored across devices in a distributed system. In one embodiment, nodes that are stored on an offline device are restored, and an offline device that comes back online is merged into the distributed system and given access to the current indexing data structure. In one embodiment, the indexing data structure is traversed to locate and restore nodes that are stored on offline devices of the distributed system.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: March 29, 2011
    Assignee: Isilon Systems, Inc.
    Inventors: Aaron J. Passey, Darren P. Schack, Peter J. Godman, Robert J. Anderson, Neal T. Fachan