Eric J Wenger

US Patent:

20060085669, Apr 20, 2006

Filed:

Apr 28, 2005

Appl. No.:

11/116346

Inventors:

Andy Rostron - Melbourne FL, US
Eric Wenger - Calabasas CA, US
W. Day - Chapel Hill NC, US

International Classification:

G06F 11/00

US Classification:

714004000

Abstract:

An apparatus and method for a computer system is used for implementing an extended distributed recovery block fault tolerance scheme. The computer system includes a supervisory node, an active node and a standby node. Each of the nodes has a primary routine, an alternate routine and an acceptance test for testing the output of the routines. Each node also includes a device driver, a monitor and a node manager for determining the operational configuration of the node as well as a common agent, the common agent being a hybrid software agent comprising both the characteristics of an EDRB model and a virtual circuit state machine, wherein the attachment objects of the agent are identical regardless of where instances of the agent are located. The supervisory node acts as an arbitrator and coordinates the operation of the active and standby nodes. A reliable data link extends between the monitors of the active and standby nodes.

US Patent:

20040001449, Jan 1, 2004

Filed:

Jun 28, 2002

Appl. No.:

10/183489

Inventors:

Andy Rostron - Everett WA, US
Eric Wenger - Bellevue WA, US
W. Day - Seattle WA, US

International Classification:

H04J001/16

US Classification:

370/282000, 370/242000

Abstract:

An apparatus and method for a computer system is used for implementing an extended distributed recovery block fault tolerance scheme. The computer system includes a supervisory node, an active node and a standby node. Each of the nodes has a primary routine, an alternate routine and an acceptance test for testing the output of the routines. Each node also includes a device driver, a monitor and a node manager for determining the operational configuration of the node. The supervisory node coordinates the operation of the active and standby nodes. The primary and alternate routines are implemented with an application task through a plurality of agent objects operating as finite state machines. A reliable data link extends between the monitors of the active and standby nodes.