Sameer V Joshi

US Patent:

7058639, Jun 6, 2006

Filed:

Aug 30, 2002

Appl. No.:

10/232907

Inventors:

Surojit Chatterjee - Foster City CA, US
Sameer Joshi - San Jose CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 17/30

US Classification:

707100, 707 1, 707 10, 711216

Abstract:

An aspect of the invention provides a method for managing information associated with a hierarchical key. A plurality of hash tables are created for a plurality of levels of a hierarchy associated with a hierarchical key, wherein each hash table is associated with a corresponding level of the hierarchy. Entries are stored within each of the plurality of hash tables, wherein the entries are associated with key names that have as many levels as the level associated with the respective hash table. Furthermore, a reference to a descendant entry that is in a respective hash table may be stored within each entry.

US Patent:

7096213, Aug 22, 2006

Filed:

Sep 23, 2002

Appl. No.:

10/253088

Inventors:

Surojit Chatterjee - Foster City CA, US
Raj Kumar - Brooklyn NY, US
Jonathan Creighton - Oakland CA, US
Alok K. Srivastava - Newark CA, US
Sameer Joshi - San Jose CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 17/30

US Classification:

707 2, 707 1, 707102, 707 10, 711113, 719321, 719328, 709201

Abstract:

A system and techniques are described for managing key-value pairs using an architecture that does not restrict its users to any specific platform or storage subsystem. According to one aspect of the invention, the repository is portable in that the architecture need not change based on the environment and platform in which the repository is used. Rather, the portion of the architecture that is platform-specific is limited to plug-ins at a storage abstraction layer of the repository. The plug-ins expose the same storage abstraction interface to the other layers of the repository, but are implemented to interact with different platforms and storage subsystems. Consequently, in response to being ported from one platform to another, the repository may simply change the plug-in to invoke for persistent storage operations.

US Patent:

7360208, Apr 15, 2008

Filed:

May 17, 2004

Appl. No.:

10/847700

Inventors:

Sameer Joshi - San Jose CA, US
Surojit Chatterjee - Foster City CA, US
Jonathan Creighton - Oakland CA, US

Assignee:

Oracle International Corp. - Redwood Shores CA

International Classification:

G06F 9/44
G06F 15/177

US Classification:

717168, 709220

Abstract:

A system and method for facilitating an automatic rolling upgrade of distributed software. In a set of computing devices (e. g. , a cluster), each node executes the distributed program, but different nodes may operate any number of different versions of the program. During a rolling upgrade of the software, the nodes all operate according to a specified acting version of the software. A node attempting the join the cluster may be required to have a software version at least equal to the acting version. When all nodes have been upgraded to a version newer than the current acting version, the acting version is reset to the lowest software version installed on a node. The rolling upgrade completes automatically when all nodes run at a specified software version (e. g. , the most recent) or have the same version installed.

US Patent:

7407046, Aug 5, 2008

Filed:

Sep 26, 2005

Appl. No.:

11/235428

Inventors:

Nikhil D. Bhat - Farmington Hills MI, US
Masato Yamada - Westbloomfield MI, US
Sameer A. Joshi - Norristown PA, US
Ananthakrishnan Surianarayanan - Lansdale PA, US

Assignee:

USUI International Corp. - Plymouth MI

International Classification:

F16D 35/02

US Classification:

192 5861, 701 68

Abstract:

An externally controlled fan drive includes a fluid clutch that alters torque delivered to a fan housing to rotate the fan housing at a target fan speed. An adaptive controller measures the actual fan speed and adaptively updates the control logic to compensate for variable physical characteristics of the fan device.

US Patent:

7437426, Oct 14, 2008

Filed:

Sep 27, 2005

Appl. No.:

11/237191

Inventors:

Sameer Joshi - San Jose CA, US
Surojit Chatterjee - Cambridge MA, US
Ken Lee - San Jose CA, US
Jonathan Creighton - Oakland CA, US
Alok Srivastava - Newark CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 15/16

US Classification:

709213, 709224

Abstract:

A group of shared-storage resources are being maintained as replicas by the nodes of a cluster. Each node in the cluster maintains a set of pointers to the members of the group. As membership changes, the set of pointers should be changed accordingly. For various, reasons, the set of pointers of a node are not changed and may point to shared-storage resources that are no longer members of the group and/or not point to shared-storage resources that are members of the group. By recording a history of membership changes in the shared-storage resources, and comparing the recording to what a node thinks the shared resources should be, an incorrect set of pointers can be detected and corrective active undertaken.

US Patent:

7617218, Nov 10, 2009

Filed:

Apr 13, 2006

Appl. No.:

11/404159

Inventors:

Surojit Chatterjee - Foster City CA, US
Raj Kumar - Brooklyn NY, US
Jonathan Creighton - Oakland CA, US
Alok K. Srivastava - Newark CA, US
Sameer Joshi - San Jose CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 7/00
G06F 17/30
G06F 17/00
G06F 12/00

US Classification:

707 10, 707100, 707203

Abstract:

A system and techniques are described for managing key-value pairs using an architecture that does not restrict its users to any specific platform or storage subsystem. According to one aspect of the invention, the repository is portable in that the architecture need not change based on the environment and platform in which the repository is used. Rather, the portion of the architecture that is platform-specific is limited to plug-ins at a storage abstraction layer of the repository. The plug-ins expose the same storage abstraction interface to the other layers of the repository, but are implemented to interact with different platforms and storage subsystems. Consequently, in response to being ported from one platform to another, the repository may simply change the plug-in to invoke for persistent storage operations.

US Patent:

7631016, Dec 8, 2009

Filed:

May 4, 2005

Appl. No.:

11/124456

Inventors:

Ken Lee - San Jose CA, US
Sameer Joshi - San Jose CA, US
Alok K. Srivastava - Newark CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 17/30
G06F 15/16

US Classification:

707201, 707200, 707202, 707203, 707 8, 707100, 714 4, 714 6

Abstract:

Less-restrictive techniques are provided for ensuring that replicated-data systems will never provide out-of-date version of data items. A replicated-data system maintains a version number, a membership group identifier, and a membership count, with each replica of a data item. These values are maintained in such a way as to allow the replicated-data system to reliably satisfy some read requests even though half, or less than half, of the replicas of the data item are available.

US Patent:

7693882, Apr 6, 2010

Filed:

Oct 4, 2005

Appl. No.:

11/243755

Inventors:

Ken Lee - San Jose CA, US
Alok K. Srivastava - Newark CA, US
Sameer Joshi - San Jose CA, US

Assignee:

Oracle International Corporation - Redwood Shores CA

International Classification:

G06F 17/30

US Classification:

707204, 707101, 707102, 711161, 711162

Abstract:

Techniques are provided for managing replicated data items in a cluster of shared nothing nodes. The techniques include synchronously propagating changes to one or more replicas, while asynchronously propagating changes to the remaining replicas. Because the replicas to which the change is synchronously replicated may be a relatively small percentage of the total number of replicas, the overhead associated with performing an update is reduced. The process of selecting which nodes are involved in the synchronous update operation may take into account a variety of factors, including which replicas are available at the time the update operation is being performed.