International Business Machines Corporation

Sap Se

Sap Ag

Ian J Mitchell

Fraser P Bohm

Andrew Wright

Julian Charles Horn

Ivan D Hargreaves

Paul Kettley

Philip Ivor Wakelin

Steven Powell

Hariharan N Venkitachalam

Stephen John Burghard

Daniel W Zachary

Michael D Brooks

Constantinos Kassimis

John Kurian

Guo Qiang Li

Ajay Kumar Sood

Andrew Dean Wharmby

Madhu B Ananthapadmanabh

Darren R Beard

Colin R Penfold

John Simon Tilling

Robert Conroy Jones

Elisabetta Flamini

Anubhuti Kaushik

George M Burgess

Ashwini Deshpande

Paul Johnson

Thomas James Freund

Matthew Alexander Webster

Glyn Normington

Catherine Mary Moxey

Andrew Simon Clement

Christopher John Baker

Jonathan Andrew Scott

Andy Wright

Alan Clive Robinson

Ann Eleanor Dalton

Phil R Lee

Roger G Lewis

Arthur James Neil

Barry Dickinson

R Anthony Storey

Jonathan Peter Hoare Lawrence

Jerzy Tadeusz Czaykowski

Stephen J Wood

A technique for operating a computer system to support an application, a first application server environment, and a second application server environment includes intercepting a work request relating to the application issued to the first application server environment prior to execution of the work request. A thread adapted for execution in the first application server environment is created. A context is attached to the thread that non-disruptively modifies the thread into a hybrid thread that is additionally suitable for execution in the second application server environment. The hybrid thread is returned to the first application server environment.

Techniques for hybrid computer thread creation and management

A method, computer system, and a computer program product for instructing the use of application programming interface (API) commands in a runtime environment is provided. The present invention may include receiving, by a computer processor, a source code with a high level language API command. The present invention may include accessing, by a computer processor, metadata for the source code and determining whether the metadata includes an instruction to be applied to the high level language API command, and applying, by a computer processor, the instruction to the high level language API command. The present invention may include processing, by a computer processor, the high level language API command to a low level code using a command translator, wherein the processing occurs after the applying the instruction.

Instructing the use of application programming interface commands in a runtime environment

A method, system, and computer program product that includes a processor cataloging a current resource definition and a current transaction state for the resource. The processor recovers the resource and a transaction state for the resource after an emergency restart, by utilizing the current resource definition and the current transaction state, wherein the recovering comprises recovering transactions of the resource. The processor completes or backs out of the transactions. The processor closes the resource and the processor recovers the resource by utilizing a global catalog.

Recovery of local resource

Disclosed is a computer-implemented method of rebalancing persistent client connections to a cluster of servers. The method comprises identifying an increase in a total client connection capacity of the cluster of servers with a network connection balancing component; and for each server in a selection of servers in the cluster of servers calculating a current client connection capacity utilization of the server from the number of persistent connections to the server and the current capacity of the server; comparing the current client connection capacity utilization with the target client connection capacity utilization; and terminating a selection of its persistent client connections by a server based on its current client connection capacity utilization exceeding the target client connection capacity utilization. Also disclosed are a computer program product and a computer system for utilizing the computer-implemented method.

Persistent connection rebalancing

A method for resolving a potential in-doubt condition of a distributed transaction, is provided. A processor receives a request to commit a transaction for a distributed transaction protocol that includes an applied process, the transaction includes a transfer of a commit decision from a coordinating node to a participating node. The processor checks the service status of the connection to the participating node, and finding the service status of the connection out of service or unavailable, the processor instructs the coordinating node to back-out (rollback) the transaction. Additionally, locality meta-data is used as an indication of reliability of the connection to the participating node, and in response to determining the participating node locality to be a remote network connection, the processor instructs the coordinating node to abort the applied process and send a standard distributed transaction protocol message over unreliable connections.

Reliability improvement of distributed transaction processing optimizations based on connection status

A method, computer program product, and system for resolving a potential in-doubt condition of a distributed transaction, is provided. A processor receives a request to commit a transaction for a distributed transaction protocol that includes an applied process, the transaction includes a transfer of a commit decision from a coordinating node to a participating node. The processor checks the service status of the connection to the participating node, and finding the service status of the connection out of service or unavailable, the processor instructs the coordinating node to back-out (rollback) the transaction. Additionally, locality meta-data is used as an indication of reliability of the connection to the participating node, and in response to determining the participating node locality to be a remote network connection, the processor instructs the coordinating node to abort the applied process and send a standard distributed transaction protocol message over unreliable connections.

In response to failure of an application that initiated updates to a group of operational system resources without the updates being successfully committed, for each physically inconsistent operational system resource that was left in a non-fully functional data indexing and access state as a result of the failure of the application, a portion of available pending updates are performed to change the respective physically inconsistent operational system resource to a partially backed out operational system resource with a fully functional data indexing and access state. Remaining available pending updates are ignored for the respective partially backed out operational system resource after the respective fully functional data indexing and access state is achieved to expedite system restart.

Resource integrity during partial backout of application updates

A workload manager is operable with a distributed transaction processor having a plurality of processing regions and comprises: a transaction initiator region for initiating a transaction; a transaction router component for routing an initiated transaction to one of the plurality of processing regions; an affinity controller component for restricting transaction routing operations to maintain affinities; the affinity controller component characterized in comprising a unit of work affinity component operable with a resource manager at the one of the plurality of processing regions to activate an affinity responsive to completion of a recoverable data operation at the one of the plurality of processing regions.

Transactional updating in dynamic distributed workloads

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Eastleigh, United Kingdom

Ian J Mitchell