International Business Machines Corporation

Robert Guy Vining

Kevin Scott Goldsmith

Gregory Paul Wurth

Colin Scott Dawson

Michael Allen Kaczmarski

Donald Paul Warren, Jr

Bonnie Jean Vining

A new file system is mounted to a mount point of an existing file system implemented in a computational system. A sentinel indicator is stored in the mount point. Prior to initiating an input/output (I/O) operation by a program, a determination is made by the program as to whether the sentinel indicator exists. In response to determining by the program that the sentinel indicator exists, the I/O operation is performed by the program. In certain alternative embodiments, in response to determining by the program that the sentinel indicator exists, the I/O operation is not performed by the program.

File system location verification using a sentinel

Provided is a method, system, and program for handling errors in a service program including service functions capable of being called from application programs. A call is received for one service function from a service function call within one application program. A series of test operations are performed when executing the service function call. Each test operation returns an identifier if the test operation failed where each identifier is associated with one error state. If one test operation failed, then the identifier for the failed test operation is transferred to an error handling agent, wherein the error handling agent accesses error information associated with the identifier and generates error information describing a specific cause of the error that caused the test operation to fail and then returns to the application program with a generic return code.

Method, system and program for handling errors occurring in function calls

Disclosed is a server having a plurality of clients coupled to the server at client nodes, and coupled to a plurality of receivers. Events, which may range from a successful completion message to a major error alert, may be generated relating to the server or to the client nodes. A method is disclosed for dynamically selectively distributing the events to particular ones of the receivers, in response to a selective enabling/disabling of the events to each receiver. The method with respect to client nodes comprises: upon opening a session of a client node, the selectively enabled events/receivers relating to the client node are determined. Upon the selective enabling/disabling occurring during the session of the client node, the determined selectively enabled events/receivers relating to the client node are dynamically updated. Then, upon occurrence of an event relating to a client node, the event is distributed to ones of the receivers having been selectively enabled for the event in the determining and the dynamically updating steps. Additionally, classes of events or wild card groups of client nodes may be enabled.

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Tucson, AZ, United States of America

Robert Guy Vining