International Business Machines Corporation

Sue L Huang

Michael G Fitzpatrick

Gary Owen McAfee

Andrew Hilliard Arrowood

John Andrew Aiken, Jr

Michael E Baskey

Gary Stuart Puchkoff

Wesley McMillan Devine

Mark William McClintock

Douglas Alan Trottman

A method, apparatus and computer program product that allows for maintaining correct states of all sub-components in a state machine, even as sub-components leave the state machine and later rejoin in some previous state. Preferably, this is achieved without requiring the system to remember the states of all sub-components or a log of every event that was fed into the state machine. Thus, the technique does not require any knowledge of the previous state of the sub-components nor the need to preserve a complete log of events that were fed into the state machine. The state machine may be used to enhance the operation of a technological process, such as a workload management environment.

Maintaining state information in a multi-component, event-driven state machine

Connections from a client to respective ones of a plurality of application instances that receive data from a shared communication protocol stack are assigned by defining an affinity between the client and a corresponding one of the plurality of application instances. Connection requests received from the client at the shared communication protocol stack are assigned to the corresponding one of the plurality of application instances if an affinity is defined between the client and the corresponding one of the plurality of application instances. Connection requests received from the client at the shared communication protocol stack are distributed to selected ones of the plurality of application instances if an affinity is not defined between the client and the corresponding one of the plurality of application instances.

Application instance level workload distribution affinities

Systems, methods and computer program products are provided for preserving a session between an SNA application and a TN3270E server after loss of an IP network connection between the TN3270E server and a TN3270E client that is communicating with the SNA application via the SNA session.

Methods, systems and computer program products for resuming SNA application-client communications after loss of an IP network connection

Methods, systems and computer program products are provided which provide connection information about connections to communication protocol stacks in a cluster of data processing systems by distributing location information between communication protocol stacks in a group of stacks within the cluster. The distributed location information about addresses and operating system images or data processing systems of communication protocol stacks is utilized to generate a list of addresses corresponding to stacks in the group so that this information may be provided to applications requesting the information from the communication protocol stacks.

Growing community of inventors

Raleigh, NC, United States of America

Sue L Huang