William H Bridge

US Patent:

6385613, May 7, 2002

Filed:

Mar 19, 1999

Appl. No.:

09/272980

Inventors:

Patricia Grewell - San Mateo CA
Terry N. Hayes - Los Altos CA
William Bridge - Alameda CA
Hans Karten - Ermelo, NL

Assignee:

Oracle Corporation - Redwood Shores CA

International Classification:

G06F 1730

US Classification:

707 8, 707202, 707205

Abstract:

A method and apparatus for managing access to resources is provided. When a process requires access to a resource, the process requests a lock on the resource from a lock manager unit that resides on the same node as the process. If a resource object for the resource does not exists, one is created in the lock manager unit, but not on lock manager units on other nodes. Because each lock manager unit does not have to store all resource objects, and resource objects are only created for resources that are actually used, the overhead of the lock management system is significantly reduced. Resources are grouped in recovery domains. When a lock manager unit that supported a recovery domain fails, the recovery domain is marked invalid. All resources in the recovery domain are considered invalid unless it would have been impossible for a failed instance to have held an exclusive lock on the resource. A snapshot of lock information is made before cleanup is performed on invalid resources.

US Patent:

6405284, Jun 11, 2002

Filed:

Oct 23, 1998

Appl. No.:

09/177916

Inventors:

William Bridge - Alameda CA

Assignee:

Oracle Corporation - Redwood Shores CA

International Classification:

G06F 1200

US Classification:

711114, 711165

Abstract:

A system and method for managing storage from multiple data storage devices are disclosed. The system and method provide improved load balancing, reduction or elimination of fragmentation, and efficient changes in hardware configurations. I/O load and data are spread relatively evenly across many data storage devices in the storage system. Dynamic reorganization can be performed for the data stored on the data storage devices.

US Patent:

6530035, Mar 4, 2003

Filed:

Oct 23, 1998

Appl. No.:

09/178387

Inventors:

William Bridge - Alameda CA

Assignee:

Oracle Corporation - Redwood Shores CA

International Classification:

H02H 305

US Classification:

714 6, 714718

Abstract:

A system and method for managing storage from multiple data storage devices are disclosed. The system and method provide improved load balancing, reduction or elimination of fragmentation, improved redundancy schemes, and efficient changes in hardware configurations. Redundancy methods are employed to prevent loss of data from an occurrence of a multiple disk failure.

US Patent:

6708237, Mar 16, 2004

Filed:

Nov 9, 2001

Appl. No.:

10/008347

Inventors:

William Bridge - Alameda CA

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 1314

US Classification:

710 39, 360 90, 711114, 711168

Abstract:

An apparatus and method for accessing a data item from a storage system having a plurality of data storage devices are disclosed. I/O operation requests are submitted to multiple data storage devices for each data item to be accessed. The I/O operation requests are issued to copies of the data items that reside on a plurality of data storage devices. More I/O operation requests are submitted than the number of data items that are to be accessed, written, or updated.

US Patent:

6715050, Mar 30, 2004

Filed:

May 31, 2001

Appl. No.:

09/873130

Inventors:

James Williams - Sunnyvale CA
William Bridge - Alameda CA
Richard Long - Belmont CA
Patrick Ritto - Menlo Park CA
Thomas Sepez - Castro Valley CA
Angelo Pruscino - Los Altos CA

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 1214

US Classification:

711164, 707 6, 713193, 711152

Abstract:

Methods are provided for communicating with and regulating access to a storage system contained within a file system. Storage access keys are used to communicate to the file system changes in location of data stored in the storage system. Fence keys are used to regulate access to the storage system.

US Patent:

6728831, Apr 27, 2004

Filed:

Apr 16, 2002

Appl. No.:

10/124310

Inventors:

William Bridge - Alameda CA

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 1200

US Classification:

711112, 711114

Abstract:

A system and method for managing storage from multiple data storage devices are disclosed. The system and method provide improved load balancing, reduction or elimination of fragmentation, and efficient changes in hardware configurations. I/O load and data are spread relatively evenly across many data storage devices in the storage system. Dynamic reorganization can be performed for the data stored on the data storage devices.

US Patent:

6874061, Mar 29, 2005

Filed:

May 24, 2002

Appl. No.:

10/155276

Inventors:

William Bridge - Alameda CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F012/00

US Classification:

711114, 711173

Abstract:

A method and mechanism for implementing variable sized extents for a logical volume or file is disclosed. Instead of using extents which all have the same size to form a logical volume, a logical volume includes extents having different extent sizes. A relatively small extent size is used for extents allocated for the first portion of a logical volume, which increases to a larger extent size for extents allocated to a second portion of the logical volume, which again increase one or more times for extents allocated for later portions of the logical volume.

US Patent:

6880102, Apr 12, 2005

Filed:

May 29, 2002

Appl. No.:

10/158757

Inventors:

William Bridge - Alameda CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F011/00

US Classification:

714 6, 714718

Abstract:

An approach for efficiently managing logical volumes of data includes subdividing logical volumes of data into relatively small pieces that are spread over several physical disks. When a determination is made that a particular disk drive is to store more than one piece of a volume, a plurality of pieces of the volume are selected to be stored on the particular disk drive based at least in part on how far apart the pieces are within an address space of the volume. In response to an addition of one or more new drives to a system that contains a plurality of disk drives, at least a piece of each of the plurality of volumes may be moved from a drive of the plurality of disk drives to at least one of the one or more new drives.