Brenda Moreno

US Patent:

20060047776, Mar 2, 2006

Filed:

Aug 31, 2004

Appl. No.:

10/931228

Inventors:

Stephen Chieng - Trabuco Canyon CA, US
Carl Drohomereski - Mission Viejo CA, US
Chris Legg - Oceanside CA, US
Brenda Moreno - Mission Viejo CA, US
Keith Olshewski - San Jose CA, US
Dennis Carlson - Huntington Beach CA, US

International Classification:

G06F 15/16

US Classification:

709217000

Abstract:

An embodiment of the invention is a method for performing an automated failover from a remote server node to a local server node, the remote server node and the local server node being in a cluster of geographically dispersed server nodes. The local server node is selected to be recipient of a failover from a remote server node by a cluster service software. The local server node is coupled to a local storage system and a local replication module external to the local storage system. The remote server node is coupled to a remote storage system and a remote replication module external to the remote storage system. The local and remote replication modules are in long distance communication with each other to perform data replication between the local and remote storage systems. A controlling cluster resource is brought online at the local server node, the controlling cluster resource being a base dependency of dependent cluster resources in a cluster group. The state of the controlling cluster resource is set to online pending to delay the dependent cluster resources in the cluster group from going online at the local server node. Configuration information of the controlling cluster resource is then verified.

US Patent:

6857082, Feb 15, 2005

Filed:

Nov 21, 2000

Appl. No.:

09/717929

Inventors:

Nripjeet Singh Josan - Mission Viejo CA, US
Brenda Ann Moreno - Mission Viejo CA, US

Assignee:

Unisys Corporation - Blue Bell PA

International Classification:

G06F011/00

US Classification:

714 4, 714 13

Abstract:

The method of the present invention is useful in a computer system including at least two server nodes, each of which execute clustered server software. The program executes a method for providing a transition from a first server node to a second server node. The method includes the steps of responding to a request for the transition and initiating a thread for effecting the transition from the first server node to the second server node. Next, determining if a shared resource is owned by the second server node and if not, calling a driver to enable functionality of the transition, which transition sets up the shared resource access to the second server node.