International Business Machines Corporation

Theodore R Maeurer

Jeffrey Alan Frey

Timothy James Hahn

Gary Stuart Puchkoff

Allan Samuel Meritt

Luke M Hopkins

Rodney Alan Little

David Andrew Booz

Frank J De Gilio

Anthony Grech

Kevin R Evans

Mark I Dinges

Donald J Berkley

An exemplary embodiment of the present invention is a method and system for isolating dropped packets in a computer network. A request for network analysis that includes a source node and a destination node is received by the invention. A map of the expected path between the two points, including the probes along the route is then generated. A capture filter profile for each probe along the route is created. A request to perform data collection is transmitted, along with the capture filter profile, to each of the probes along the route. Data is received back from the data collection in the form of a data log. Exception data is generated by comparing the data log to the expected path between the two points. Additional embodiments include a system and storage medium for isolating dropped packets in a computer network.

Method and system for isolating and simulating dropped packets in a computer network

A transactional name server. One or more objects of the name server are managed as transactional objects, thereby providing a transactional name server. Atomic updates are provided in the name server by the addition of transactional semantics. The transactional semantics include making the objects of the name space managed objects and providing a local interface to a directory service that propagates a transactional context from the name server through a directory down to a resource manager.

Transactional name service

Resolution of a compound name of an object may indicate that a disjunction exists within the object name. This disjunction represents a foreign binding indicating that the resolve cannot be completed on one system or an alias name of the object. When a disjunction in the object name is identified, the object associated with the disjunction is obtained. Thereafter, a resolve operation on that object is performed using at least a portion of the object name.

Federation of naming contexts across multiple and/or diverse underlying directory technologies

An object factory is registered under multiple interface names. The interface names have an inheritance relationship with an object implementation associated with the object factory. The names are registered in a repository of a name space, such as a Life Cycle Repository. Thus, an object factory can be located using any one of the interface names.

Registration of object factories under multiple interface names

A technique is presented for dynamically inserting a function into an existing application executable of an object-oriented system at runtime of the executable and without requiring recompiling of the code. This is accomplished by modifying configuration settings of the executable at runtime to add a setting to specify the function for at least one class of the executable. The modified configuration settings are then used when running the executable and when a class is encountered for which the function is active, a redirection stub is dynamically inserted to implement the function for the methods of that class. In one embodiment, the function is a trace function and the redirection stub implements an entry trace and an exit trace about each target method of a class for which the trace function is active. Various CORBA implementations of the technique are possible.

Dynamically inserting a function into an application executable at runtime

A large data processing system includes a channel path management program that is periodically executed during operation of the system to gather control unit and subchannel utilization statistics and to monitor such statistics. If the degree of utilization of a channel path or an I/O device exceeds a predetermined threshold value, one or more change(s) is(are) dynamically made in the channel path configuration.

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Poughkeepsie, NY, United States of America

Theodore R Maeurer