International Business Machines Corporation

Mitchell Dennis Felton

Brian Edward Olson

Kenneth Wayne Roberson

Robert A Morgan

Karl Michael Solie

Ray LeRoy Lucas

David W Alderman

An approach is provided for queuing clients when a web page is temporarily unavailable. The approach includes providing a computer infrastructure operable to: maintain a queue of clients requesting the web page; receive an indication of an availability number from a host of the web page; and release one or more of the clients from the queue equal to the availability number indicated by the host, based on the receiving the indication of the availability number.

Custom error page enabled via networked computing service

Verifying speculative multithreading in an application executing in a computing system, including: executing one or more test instructions serially thereby producing a serial result, including insuring that all data dependencies among the test instructions are satisfied; executing the test instructions speculatively in a plurality of threads thereby producing a speculative result; and determining whether a speculative multithreading error exists including: comparing the serial result to the speculative result and, if the serial result does not match the speculative result, determining that a speculative multithreading error exists.

Verifying speculative multithreading in an application

A method and apparatus is described for dynamic relocation of a job executing on multiple nodes of a high performance computing (HPC) systems. The job is dynamically relocated when the messaging network is in a quiescent state. The messaging network is quiesced by signaling the job to suspend execution at a global collective operation of the job where the messaging of the job is known to be in a quiescent state. When all the nodes have reached the global collective operation and paused, the job is relocated and execution is resumed at the new location.

Dynamic job relocation in a high performance computing system

The exemplary embodiments of the present invention provide a method for efficiently identifying the bad component(s) in a multi-node system. The method includes assigning a unique ID to each of a plurality of nodes on the multi-node system, generating test statistics from a test on a plurality of nodes, and comparing the test statistics for the plurality of nodes against a first topology to generate a first number of clusters of bad nodes. The method further includes comparing the test statistics for the plurality of nodes against a second topology to generate a second number of clusters of bad nodes, and identifying the bad nodes by comparing the cluster sizes to a topology threshold.

System and method to efficiently identify bad components in a multi-node system utilizing multiple node topologies

A requester-side autonomic governor is provided for a requester configured to send service requests to a service provider. For example, the requester and service provider may be disposed in a Service Oriented Architecture (SOA) architected system. A feedback loop, preferably a monitor portion of a Monitor, Analyze, Plan, and Execute (MAPE) loop, is configured to monitor responses to service requests. An autonomic governor mechanism limits the type and/or number of concurrent service requests according to a resource pool scheme, and dynamically adjusts a resource threshold of the resource pool scheme based on information provided by the feedback loop. In one embodiment, the resource threshold is reduced if more than a predetermined number of service requests generated time-outs, and is increased if more than a predetermined number of service requests are being held awaiting available pool resources and less than a predetermined number of service requests generated time-outs.

Requester-side autonomic governor

Computer-implemented method for implementing a requester-side autonomic governor using feedback loop information to dynamically adjust a resource threshold of a resource pool scheme

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Rochester, MN, United States of America

Mitchell Dennis Felton