International Business Machines Corporation

Marcos Nogueira Novaes

Gregory D Laib

Jeffrey S Lucash

Ronald T Goering

George Sohos

Rosario A Uceda-Sosa

Kenneth C Briskey

Christopher Frank Codella

Kailash N Marthi

James Robert Harold Challenger

Steven R Champagne

Peter Richard Badovinatz

Felipe Knop

Michael Anthony Schmidt

Anton A Prenneis, Jr

A method for representing state transitions within a state machine includes representing a set of allowed transitions between states as a transition pair wherein a first value of the transition pair indicates a set of nodes from which to transition and a second value of the pair indicates a set of nodes to which to transition. The nodes represent states within a state machine. The method further includes defining a role of an entity within the state machine by assigning a number of transition pairs to the entity, the value pairs defining how the entity can transition through the state machine.

Representing state transitions

The invention provides a system/method of processing client requests over a computer network of hosts, that includes creating persistent containers in the hosts, creating objects in the containers, grouping the containers into grid container arrays, grouping objects within containers that are within a single grid container array into grid object arrays, creating one micro scheduler for each grid container array, dividing each of the client requests into a plurality of tasks, and assigning groups of the tasks to the microschedulers, wherein the microschedulers assign individual tasks to the objects. The invention assigns the microschedulers additional groups of tasks as the microschedulers return groups of completed tasks. The method can also include passing the client requests through gateways to multiple grid services schedulers.

Topology aware grid services scheduler architecture

Methods and arrangements for monitoring at least one interconnection between at least two nodes in a distributed network. At least one subscriber node is prompted to ascertain the integrity of an interconnection with at least one parent node.

Methods and arrangements for monitoring subsource addressing multicast distribution trees

Methods and arrangements for facilitating subscription among at least two nodes in a distributed network, involving the designation of one of the nodes as a publisher node, the designation of one of the nodes as a subscriber node, and the recordation of a path between the subscriber node and the publisher node. The path includes at least one link between the subscriber node and the publisher node, and the recordation involves recording each distinct link in the path between the subscriber node and the publisher node.

Methods and apparatus for updating subsource addressing multicast routing records in a communications network

The management and use of replicated distributed transactions is facilitated. A distributed synchronous transaction system protocol is provided to manage the replication of distributed transactions for client application instances. The distributed synchronous transaction system allows transactions to be replicated without having the client application instances be aware of other instances to receive the transaction. Further, if a failure occurs during processing of a distributed replicated transaction, the distributed synchronous transaction system manages the recovery of the failure.

Method, system and program products for managing processing groups of a distributed computing environment

Methods and arrangements for facilitating notification among at least two nodes in a distributed network, involving the designation of one of the nodes as a publisher node, the designation of at least one other of the nodes as at least one subscriber node, and the propagation of a transmission from the publisher node to the at least one subscriber node via at least one link. The propagation is undertaken via only one distinct transmission along any single link.

Methods and apparatus for the propagation of multicast transmissions in a communications network

A collaborative Web research method (and system), includes organizing a plurality of documents in a N-dimensional space according to a collection of subject words, and based on the organizing, retrieving, by a user, said documents organized in the N-dimensional space according to the collection of subject words.

Method and system for collaborative web research

Various components are provided to manage a clustered environment. These components include a System Registry that provides a global data storage; a Configuration manager that stores data locally on nodes of the clustered environment and globally within the System Registry; a Liveness component to provide status of communications paths of the cluster; a Group Services component that provides services to one or more other components of the clustered environment; and a Resource Management component that communicates with one or more resource controllers of the clustered environment. Each of the components of the clustered environment has one or more data and/or functional dependencies on one or more other components of the environment. However, relationships between the components are created such that the data and functional dependencies form an acyclic graph (i.e., a cycle of dependency relationships is avoided).

Method, system and program products for managing a clustered computing environment

A client application sends a request to a given server of a replicated group of servers, and expects a response to the request. If the client does not receive a response to the request, or if the server is otherwise unavailable, the client is automatically reconnected to another server of the replicated group. The servers of the replicated group do not, however, have to have any knowledge of the communication session of the client.

Method, system and program products for automatically connecting a client to a server of a replicated group of servers

A Graphical User Interface (GUI) (and method for navigating data blocks) includes a display window, and a retrieval object displayed on the display window for assisting a user in retrieving data which is spatially organized in N-dimensions and displaying the data on the window.

Graphical web browsing interface for spatial data navigation and method of navigating data blocks

Method, system and program products for ordering lists of service addresses to provide load balancing of a clustered environment

Methods and arrangements for facilitating multicast communication among at least two nodes in a distributed network configured for point to point communications. Each router node is provided with a first switching arrangement adapted to route a message between a publisher node and a subscriber node in accordance with a first protocol, and a second switching arrangement adapted to route a message between the publisher node and the subscriber node in accordance with a second protocol.

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Hopewell Junction, NY, United States of America

Marcos Nogueira Novaes