International Business Machines Corporation

Gregory D Laib

Marcos Nogueira Novaes

Jeffrey S Lucash

Ronald T Goering

Rosario A Uceda-Sosa

George Sohos

Kailash N Marthi

Steven R Champagne

Peter Richard Badovinatz

Bob C Liang

Bruce C Hempel

Reinhard Theodor Buendgen

Felipe Knop

Juergen P Schneider

Thomas Lumpp

Chun-Shi Chang

Kenneth C Briskey

Michael Anthony Schmidt

James Corona

John K Alex

Anthony M Fiore

Rong-Sheng Lee

Anton A Prenneis, Jr

Randal L Henderson

An autonomic computing system and method determine policy definitions () and a set of available actions (); monitor resources distributed within the system; determine if the system is at a desired end state; and modify resource states by sending instructions for the resources to perform available actions. The policy definitions () specify: start order between resources, prioritization between resources, conditional activation of policies, desired end state of resources, and location limitation of resources. The system and method receive status information from available resources, and monitor and modify the system until it reaches the desired end state. The policy definitions () can be determined by specifying a user-defined system end state and resource relationships. The policy definitions () can further harvest implicit relationships between resources, via self-discovery, and underlying relationships among resources.

Policy driven autonomic computing-specifying relationships

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

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

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

Method, system and program products for managing identifiers of components of a clustered environment

Threads of a multithreaded client application access data in one or more global data repositories via one or more local trees. Each local tree is associated with one or more locked resources of the global data repository. By using the local trees in accessing the data of the global repository, a thread is automatically associated with a lock block and therefore, the granting of locks is independent of any threading models.

Method, system and program products for concurrently accessing a global data repository by multithreaded clients

Method, system and program products for controlling system traffic of a clustered computing environment

Method, system and program products for recovering from failures within a shared nothing distributed computing environment

Method, system and program products for managing cluster configurations

Method, system and program products for serializing replicated transactions of a distributed computing environment

Synchronous replication of transactions in a distributed system

Method, system and program products for providing clusters of a computing environment

Method, system and program products for defining nodes to a cluster

A facility is provided for managing a service connection between a client process having a single threaded library and a server process. The facility includes monitoring activity of a client code of the client process by the client library, and commensurate therewith monitoring activity of the client library across a service connection to the server process, wherein activity of the client library on the service connection is indicative of activity of the client code. The service connection between the client process and the server process is terminated if a message is not received at the server process from the single threaded client library within a defined tolerance interval. Upon termination of the service connection, any locked client resource is recovered at the server process.

Facility for managing a service connection between a client process having a single threaded library and a server process

Growing community of inventors

Kingston, NY, United States of America

Gregory D Laib