Jill D Jones

US Patent:

6477663, Nov 5, 2002

Filed:

Apr 7, 1999

Appl. No.:

09/287329

Inventors:

Luiz A. Laranjeira - Austin TX
Glen W. Gordon - Austin TX
Jill A. Jones - Austin TX
Irma De Leon - Austin TX
Yuan Sylvia Tien - Austin TX
Stephen M. Sanderson - Austin TX
Thomas J. Davidson - Austin TX
Charles Young - Austin TX

Assignee:

Compaq Computer Corporation - Houston TX

International Classification:

G06F 1100

US Classification:

714 11, 709201

Abstract:

A method and apparatus for providing process-pair protection to complex applications is provided. The apparatus of the present invention includes a process-pair manager or PPM. The PPM is replicated so that a respective PPM is deployed on each of two computer systems. Each computer system also hosts a watchdog process that monitors and restarts the PPM in case of PPM failures. Each PPM communicates with a respective instance of an application. The application instances may include one or more processes along with associated resources. During normal operation the primary application provides service and periodically checkpoints its state to the backup application. The backup application functions in a standby mode. The two PPMs communicate with each other and exchange messages as state changes occur. The apparatus also includes in each computer system a node watcher that is the PPM of failures of the remote computer system.

US Patent:

6622261, Sep 16, 2003

Filed:

Aug 1, 2002

Appl. No.:

10/210904

Inventors:

Luiz A. Laranjeira - Austin TX
Glen W. Gordon - Austin TX
Jill A. Jones - Austin TX
Irma De Leon - Austin TX
Yuan Sylvia Tien - Austin TX
Stephen M. Sanderson - Austin TX
Thomas J. Davidson - Austin TX
Charles Young - Austin TX

Assignee:

Compaq Information Technologies Group, L.P. - Houston TX

International Classification:

G06F 1100

US Classification:

714 11, 709221

Abstract:

Techniques using process-pair protection of complex applications are disclosed which provide fast and stateful application failover.