US 7,228,453 B2Granted

Techniques for maintaining high availability of networked systems

AssigneeGoAhead Software, Inc.

InventorsMichael D. O'Brien, Bryan S. Klisch, John C. Vogel, Gregory I. Thiel

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Abstract

This computer implemented software invention supervises networked system resources with the goal of maximizing service availability, providing on-demand and uninterrupted access to service, and minimizing the down time due to failures. It is a cluster-wide solution that co-ordinates the states and activities of resources, assigns availability roles, implements recovery from failures, and implements overall system policy. To do this, it maintains a system model of the system's physical and logical configuration and models the resources using managed objects that provides an extensive representation of the states, roles, and relationships of the systems resources.

Claims7

Dependent claims

A method for maintaining on demand and uninterrupted access to a networked computer system service comprising the steps of:

a) determining what cluster resources are present in a network and providing a managed object abstraction to represent the cluster resource;
b) establishing a directed graph of dependencies among the resources;
c) selecting a particular node as an availability manager for the cluster;
d) establishing communication links among the availability manager, any non-manager nodes and the managed objects representing the resources;
e) establishing a policy determining the desired response of the cluster resources to changing system states and conditions;
and
f) responding to the changing system states and conditions by reassigning resource roles as required.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/399,286Filed 15 Oct 2001 · us provisional application
Priority: 16 Oct 2000
Published: US 2005/0071470 A131 Mar 2005
Granted: 5 Jun 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H04L 41/06
Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks: management of faults,…
G06F 11/2097
Using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements: maintaining the standby controller/processing…
H04L 41/0894
Configuration management of networks or network elements: policy-based network configuration management
G06F 11/1492
Generic software techniques for error detection or fault masking: using run-time replication performed by the application software, e.g. N-modular…