International Business Machines Corporation

Martin W Cocks

Paul Michael Cadarette

John Simon Tilling

Robert Daniel Love

Serge Bourbonnais

David B Petersen

Michael D Brooks

Michael G Fitzpatrick

Julian Charles Horn

Jenny Jing He

Fraser P Bohm

Gregory Walter Vance

David James Seager

Martin James Rowe

Pamela McLean

A computer-implemented method of establishing metadata associated with a transaction in a transaction processing system having application logic for executing the transaction, the computer-implemented method includes receiving, from a requestor, request data associated with the transaction, the request data comprising data and metadata. The method also includes peeking, during receiving the request data, of the request data looking for the metadata associated with the transaction and responsive to finding metadata associated with the transaction, directly instantiating an instance of application logic.

Establishing transaction metadata

A method of monitoring requests to a code set is provided, which includes: receiving a request to the code set; creating a trace for the request, the trace defining the path of the request through the code set; accessing a plurality of stored trace patterns, each stored trace pattern defining an acceptable path of a request through the code set; comparing the created trace to the stored trace patterns; and storing the created trace if it does not match one of the stored trace patterns.

Request monitoring to a code set

Embodiments of the disclosure are directed to methods, systems and computer program products for performing a planned workload switch. A method includes receiving a request to switch a site of an active workload and stopping one or more long running processes from submitting a new request to the active workload. The method also includes preventing a new network connection from accessing the active workload and processing one or more transactions in a queue of the active workload for a time period. Based on a determination that the queue of the active workload is not empty after the time period, the method includes aborting all remaining transactions in the queue of the active workload. The method further includes replicating all remaining committed units of work to a standby workload associated with the active workload.

Achieving continuous availability for planned workload and site switches with no data loss

Embodiments of the present invention provide a method, system and computer program product for consistent replication of transactional updates. In an embodiment of the invention, a method for consistent replication of data in a transaction processing system is provided. The method includes recording entries in a replication log of different data updates and corresponding transactions and additionally recording entries in the replication log indicating whether or not the transactions have been backed out. The method also includes replicating only those data updates referenced in the log which do not correspond to transactions indicated in the log to have been backed out. For instance the additionally recorded entries in the replication log indicate when a transaction has been backed out. Alternatively, the additionally recorded entries in the replication log indicate when a transaction has been committed.

Consistent replication of transactional updates

Growing community of inventors

Eastleigh, United Kingdom

Martin W Cocks