International Business Machines Corporation

David Allan Hellenga

Brian D Valentine

Dennis J Foreman

Thomas Michael Mooney

Richard Kevin Hill

Edward Gretz

Mary Kim Majikes

Richard K Hill

This invention relates generally to communications with distributed nodes in a computer network, and more specifically with change management in a computer network.

Sub-entry point interface architecture for change management in a computer network

A computer system monitors a variety of conditions indicating levels to which different components, services and resources are being utilized, and based on these levels, determines a measure of overall system utilization. By way of example, the conditions are CPU utilizations dispatcher queue length, number of active users, number of users in an I/O wait queue and the paging rate. The system determines and repeatedly updates a data value for each of the conditions representing a respective amount of utilization. Then, the system determines a weighted summation based on the latest update of the data values and a significance of each of the data values in indicating system utilization. Next, the system compares the weighted summation to two or more thresholds, and determines and performs an action based on the comparison of the weighted summation to the thresholds. The system determines and performs a relatively severe action when the weighted summation exceeds the greatest of the thresholds and a relatively moderate action when the weighted summation is less than the greatest of the thresholds but greater than least one other of the thresholds. Thus, the action is commensurate with the overall utilization of the computer system.

Monitoring and handling of exception conditions in computer system

A method for extracting and replacing Control Block information in an operating system. An extract replace table is provided to permit application programmers to locate and in certain instances replace items contained in operating system Control Blocks. The user of the application program need not know the precise location of information contained in operating system Control Blocks. The extract/replace table will, upon formulating a request for either extracting or replacing Control Block items, find the requested items and read or replace them. Revisions of operating system programs may be made without regard to the new location of control items. The system user will locate and replace Control Block items by addressing the updated extract/replace tables.

Method for extracting and/or replacing control system information in a

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Endwell, NY, United States of America

David Allan Hellenga