James A Carey

US Patent:

6480950, Nov 12, 2002

Filed:

Jan 24, 2000

Appl. No.:

09/490424

Inventors:

Igor Lyubashevskiy - Brighton MA
Albert Hopeman - Arlington MA
James E. Carey - Brookline MA

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 1200

US Classification:

711206, 711202, 711207

Abstract:

A method for translating, in a software paging system, an input key describing a virtual page to the address of the page in main memory, comprises creating, in main memory, a translation buffer which has a plurality of records. Each record has a plurality of cells, each cell having a key field for storing a key or a portion of a key which identifies a page in memory, and each cell having an address field for storing the address of the identified page. If the input key matches a stored key, the address associated with the identified page is retrieved. Otherwise, a paging manager is invoked to establish an address for the input key, and the input key and established address are saved. The least recently used order of memory pages addressed in the dereferenced record is indicated by updating a least recently used cell indicator associated with the dereferenced record. Alternatively, a table having a plurality of entries is created, wherein each entry references a respective hash chain of translation records in a main memory translation buffer. Each translation record has a key field for storing a key identifying a page, and an associated address field for storing the address of the identified page in memory.

US Patent:

6574720, Jun 3, 2003

Filed:

Jun 19, 2000

Appl. No.:

09/595667

Inventors:

Albert A. Hopeman - Arlington MA
James E. Carey - Brookline MA
Bruce F. Golbus - Waban MA

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 1208

US Classification:

711170, 707206

Abstract:

In a multi-threaded computing environment, a shared cache system reduces the amount of redundant information stored in memory. A cache memory area provides both global readable data and private writable data to processing threads. A particular processing thread accesses data by first checking its private views of modified data and then its global views of read-only data. Uncached data is read into a cache buffer for global access. If write access is required by the processing thread, the data is copied into a new cache buffer, which is assigned to the processing threads private view. The particular shared cache system supports generational views of data. The system is particularly useful in on-line analytical processing of multi-dimensional databases. In one embodiment, a dedicated collector reclaims cache memory blocks for the processing threads. By utilizing a dedicated collector thread, any processing penalty encountered during the reclamation process is absorbed by the dedicated collector.

US Patent:

6584475, Jun 24, 2003

Filed:

Dec 15, 1999

Appl. No.:

09/465191

Inventors:

James E. Carey - Brookline MA
Albert Hopeman - Arlington MA

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 1200

US Classification:

707203

Abstract:

Growth of databases in read-repeatable environments is controlled by an erase list maintained for each generation of the database. The erase list identifies pages which are retained in the database to facilitate read repeatability. The system uses the erase list to identify obsolete pages which can be removed from the database. The removed pages can then be reclaimed for re-use by a subsequent generation.

US Patent:

6845430, Jan 18, 2005

Filed:

Jun 2, 2003

Appl. No.:

10/452461

Inventors:

Albert A. Hopeman - Arlington MA, US
James E. Carey - Brookline MA, US
Bruce F. Golbus - Waban MA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 1208

US Classification:

711150, 711133, 707206

Abstract:

In a multi-threaded computing environment, a shared cache system reduces the amount of redundant information stored in memory. A cache memory area provides both global readable data and private writable data to processing threads. A particular processing thread accesses data by first checking its private views of modified data and then its global views of read-only data. Uncached data is read into a cache buffer for global access. If write access is required by the processing thread, the data is copied into a new cache buffer, which is assigned to the processing thread's private view. The particular shared cache system supports generational views of data. The system is particularly useful in on-line analytical processing of multi-dimensional databases. In one embodiment, a dedicated collector reclaims cache memory blocks for the processing threads. By utilizing a dedicated collector thread, any processing penalty encountered during the reclamation process is absorbed by the dedicated collector.

US Patent:

6886080, Apr 26, 2005

Filed:

Sep 19, 2001

Appl. No.:

09/955773

Inventors:

James E. Carey - Brookline MA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F012/08

US Classification:

711148, 711137

Abstract:

In a multi-threaded computing environment, a shared cache system reduces the amount of redundant information stored in memory. A cache memory area provides both global readable data and private writable data to processing threads. A particular processing thread accesses data by first checking its private views of modified data and then its global views of read-only data. Uncached data is read into a cache buffer for global access. If write access is required by the processing thread, the data is copied into a new cache buffer, which is assigned to the processing thread's private view. The particular shared cache system supports generational views of data. The system is particularly useful in on-line analytical processing of multi-dimensional databases.

US Patent:

6898608, May 24, 2005

Filed:

Apr 16, 2003

Appl. No.:

10/417732

Inventors:

A. A. Hopeman - Arlington MA, US
James Carey - Brookline MA, US
Ekrem Soylemez - Arlington MA, US
Bruce Golbus - Waban MA, US
Igor Lubashev - Cambridge MA, US
Zhiqi Qiu - Waltham MA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F017/30

US Classification:

707202, 7071041

Abstract:

An analytical workspace includes a set of data on which what-if analysis is performed, which is stored persistently and managed in a relational database system. The data may be stored as a binary large object in relational tables, and may comprise a portion of a multidimensional cube. A series of commands on the analytical workspace is received by a database server. In response to the commands, changes are made to the data in temporary storage. Redo information is not generated at this time in association with such changes. Hence, these changes are not made permanent at this time. At some point, the server may receive an update command to make the changes permanent. In response to the update command, redo information is generated for the changes reflected in the temporary storage and the changes are made permanent, in accordance with relational database properties.

US Patent:

7565651, Jul 21, 2009

Filed:

May 25, 2000

Appl. No.:

09/578290

Inventors:

James E. Carey - Brookline MA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 9/46

US Classification:

718100, 718102, 718104, 718105, 718106, 718107

Abstract:

A parallel task scheduling system in a multi-threaded computing environment includes a plurality of parallel task queues. Each task queue is associated with a respective worker thread from a plurality of worker threads. Each new task is assigned to one of the task queues. That assignment process including selecting a random queue and, from that starting point, locating an empty queue (if one exists). The task is then placed on that empty queue for processing. Typically, the worker thread associated with the identified task queue will process the queued task. If the worker thread is busy processing another task, the queued task may be stolen by a free thread. A waiting task, can thus be processed in an efficient manner.

US Patent:

7847253, Dec 7, 2010

Filed:

Oct 15, 2008

Appl. No.:

12/252101

Inventors:

James E. Carey - Waltham MA, US
Nathaniel J. McCaffrey - Hampton Falls NH, US
Martin U. Pralle - Wayland MA, US

Assignee:

SiOnyx, Inc. - Beverly MA

International Classification:

G01J 5/00

US Classification:

2503383

Abstract:

A detector incorporating a laser-doped element that is favorably absorbing to at least a portion of the electromagnetic spectrum, for example in the infra-red range, is used in a light detector article. Readout circuits permitting a detector to operate in a substantial range of the electromagnetic spectrum, including the visual and infra-red range, enable day and night imaging in some embodiments. Configurations for making the detectors are also provided.