Emc Corporation

Udi Kleers

Patricia Gomes Soares Florissi

Shmuel Kliger

Yechiam Yemini

Danilo Florissi

Eyal Yardeni

Jerry Y Goldman

A method and apparatus for determining causality mapping between causing events and detectable events among a plurality of nodes in a distributed system is disclosed. The method comprises the steps of automatically generating a causality mapping model of the dependences between causing events at the nodes of the distributed system and the detectable events in a subset of the nodes, the model suitable for representing the execution of at least one system operation. In one aspect the generation is perform by selecting nodes associated with each of the detectable events from the subset of the nodes and indicating the dependency between a causing event and at least one detectable event for each causing event at a node when the causing event node is a known distance from at least one node selected from the selected nodes. In still another aspect, the processing described herein is in the form of a computer-readable medium suitable for providing instruction to a computer or processing system for executing the processing claimed.

Method and apparatus for determining causality mapping of distributed systems

A method and apparatus for operating on a system containing a plurality of components in communication using multicast communication protocol is disclosed. The method comprises the steps of representing selected ones of the plurality of components, the relationship among the components and the associated with the communication protocols, determining a mapping between a plurality of events and a plurality of observable events occurring among the components and among the communication protocols, wherein the mapping is represented as a value associating each event with each observable event, and performing the system operation in conjunction with the relationship between the events and observable events. The operations may be selected from the group of monitoring, discovering, managing, analyzing and displaying the components associated with the multicast protocols.

Method and apparatus for configuration and analysis of network multicast routing protocols

A method and apparatus for determining the number and location of monitoring entities in a distributed system is disclosed. The method comprising the steps of automatically generating a causality mapping model of the dependences between causing events at the nodes of the distributed system and the detectable events associated with a subset of the nodes, the model suitable for representing the execution of at least one system operation, reducing the number of detectable events in the model, wherein the reduced number of detectable events is suitable for substantially representing the execution of the at least one system operation; and placing at least one of the at least one monitoring entities at selected ones of the nodes associated with the detectable events in the reduced model. In another aspect, the processing described herein is in the form of a computer-readable medium suitable for providing instruction to a computer or processing system for executing the processing claimed.

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Elmsford, NY, United States of America

Udi Kleers