Ray L Lucas

US Patent:

8615677, Dec 24, 2013

Filed:

Nov 21, 2012

Appl. No.:

13/683052

Inventors:

David L. Darrington - Rochester MN, US
Ray L. Lucas - Lakewood Ranch FL, US
John M. Santosuosso - Rochester MN, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 9/46

US Classification:

714 411, 714 1, 714 63, 718105

Abstract:

Techniques are described for decentralizing a job scheduler in a distributed system environment. Embodiments of the invention may generally include receiving a job to be performed by a multi-nodal system which includes a cluster of nodes. Instead of a centralized job scheduler assigning the job to a node or nodes, each node has a job scheduler which scans a shared-file system to determine what job to execute on the node. In a job requiring multiple nodes, one of the nodes that joined the multi-nodal job becomes the primary node which then assigns and monitors the job's execution on the multiple nodes.

US Patent:

8645745, Feb 4, 2014

Filed:

Feb 24, 2011

Appl. No.:

13/033938

Inventors:

Eric L. Barsness - Pine Island MN, US
David L. Darrington - Rochester MN, US
Ray L. Lucas - Rochester MN, US
John M. Santosuosso - Rochester MN, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 9/46

US Classification:

714 411, 714 1, 714 63, 718105

Abstract:

Techniques are described for decentralizing a job scheduler in a distributed system environment. Embodiments of the invention may generally include receiving a job to be performed by a multi-nodal system which includes a cluster of nodes. Instead of a centralized job scheduler assigning the job to a node or nodes, each node has a job scheduler which scans a shared-file system to determine what job to execute on the node. In a job requiring multiple nodes, one of the nodes that joined the multi-nodal job becomes the primary node which then assigns and monitors the job's execution on the multiple nodes.

US Patent:

20110197196, Aug 11, 2011

Filed:

Feb 11, 2010

Appl. No.:

12/703922

Inventors:

Mitchell Dennis Felton - Rochester MN, US
Ray LeRoy Lucas - Rochester MN, US
Karl Michael Solie - Rochester MN, US

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

International Classification:

G06F 9/50

US Classification:

718104

Abstract:

A method and apparatus is described for dynamic relocation of a job executing on multiple nodes of a high performance computing (HPC) systems. The job is dynamically relocated when the messaging network is in a quiescent state. The messaging network is quiesced by signaling the job to suspend execution at a global collective operation of the job where the messaging of the job is known to be in a quiescent state. When all the nodes have reached the global collective operation and paused, the job is relocated and execution is resumed at the new location.