Robert J Swartz

US Patent:

20120185437, Jul 19, 2012

Filed:

Nov 15, 2011

Appl. No.:

13/297262

Inventors:

Elan Pavlov - Cambridge MA, US
Stephen Ness - San Francisco CA, US
Roger Critchlow - Santa Fe NM, US
Robert Swartz - Highland Park IL, US
Timothy S. Murphy - Milwaukee WI, US
Ronald Lachman - Northbrook IL, US

International Classification:

G06F 12/16
G06F 17/30

US Classification:

707652, 707E17005

Abstract:

A distributed heterogeneous or homogeneous file storage system divides logical responsibility for data from actual control of the data by using separate file and storage managers. Each file manager provides access to stored files and stores metadata associated with each of the files for which it is responsible. A file manager control component allocates responsibilities among file managers, assigns management responsibilities for individual files, and maintains a record of which files are assigned to each manager. Each storage manager is responsible for managing storage of files on data storage devices and maintains a record of the location of each stored file. A storage manager control component allocates responsibilities among storage managers, assigns responsibilities for individual files, and maintains a record of which files and storage devices are assigned to each manager. A client provides user access, initiates actions within the system, and implements a redundant data recovery and reconstruction scheme.

US Patent:

42942012, Oct 13, 1981

Filed:

Feb 5, 1979

Appl. No.:

6/009490

Inventors:

Robert V. Swartz - Mountain View CA

International Classification:

F02B 3304
F01L 1100
F02B 2512

US Classification:

123 73R

Abstract:

A two-stoke cycle combustion-engine with crank-chamber compression is described, free of charging transfer passages external to the cylinder, with pumping-displacement exceeding working-displacement for responsive intake and thorough scavenging of spent-gas residue, and featuring an annular water-cooled cell, suspended from the cylinder-head by several water-conduits, and cooperating with an annular recess in the piston-head so as to form, and transversely separate, a plain working-chamber and an annular working-chamber, longitudinally scavengeable in series, bottom-to-top and top-to-bottom, respectively, with minimal loss of charge to exhaust-port, such a system of scavenging also reducing piston cooling-problems and misfiring associated with charge-dilution (in gasoline-engines operating under partial-charge conditions). In addition, a more general scavenging principle is enunciated and claimed, applicable to rear-compression and separately-scavenged two-stroke engines.

US Patent:

20170077950, Mar 16, 2017

Filed:

Nov 28, 2016

Appl. No.:

15/362360

Inventors:

- Northbrook IL, US
Stephen Ness - San Francisco CA, US
Roger Critchlow - Santa Fe NM, US
Robert Swartz - Highland Park IL, US
Timothy S. Murphy - Milwaukee WI, US
Ronald Lachman - Northbrook IL, US

International Classification:

H03M 13/05
H03M 13/00
G06F 3/06

Abstract:

A distributed data storage system breaks data into n slices and k checksums using at least one matrix-based erasure code based on matrices with invertible submatrices, stores the slices and checksums on a plurality of storage elements, retrieves the slices from the storage elements, and, when slices have been lost or corrupted, retrieves the checksums from the storage elements and restores the data using the at least one matrix-based erasure code and the checksums. In a method for ensuring restoration and integrity of data in computer-related applications, data is broken into n pieces, k checksums are calculated using at least one matrix-based erasure code based on matrices with invertible submatrices, and the n data pieces and k checksums are stored on n+k storage elements or transmitted over a network. If, upon retrieving the n pieces from the storage elements or network, pieces have been lost or corrupted, the checksums are retrieved and the data is restored using the matrix-based erasure code and the checksums.

US Patent:

20150347435, Dec 3, 2015

Filed:

Aug 2, 2015

Appl. No.:

14/816039

Inventors:

- Northbrook IL, US
Stephen Ness - San Francisco CA, US
Roger Critchlow - Sante Fe NM, US
Robert Swartz - Highland Park IL, US
Timothy S. Murphy - Milwaukee WI, US
Ronald Lachman - Northbrook IL, US

International Classification:

G06F 17/30
G06F 11/10

Abstract:

A distributed heterogeneous or homogeneous file storage system divides logical responsibility for data from actual control of the data by using separate file and storage managers. Each file manager provides access to stored files and stores metadata associated with each of the files for which it is responsible. A file manager control component allocates responsibilities among file managers, assigns management responsibilities for individual files, and maintains a record of which files are assigned to each manager. Each storage manager is responsible for managing storage of files on data storage devices and maintains a record of the location of each stored file. A storage manager control component allocates responsibilities among storage managers, assigns responsibilities for individual files, and maintains a record of which files and storage devices are assigned to each manager. A client provides user access, initiates actions within the system, and implements a redundant data recovery and reconstruction scheme.