Abstract: A transaction processing method, system and computer program product for processing applications comprising multiple component transactions. A transaction failure of a component transaction causes a reliable admission of failure by means of a failure indicator to be made available to one or more further transactions. The failure indicator is stored in recoverable storage, so that its effect can survive system failure and recovery.

Abstract: A data management system and method enables the storage of long records in a set of keyed physical records of restricted length while minimising movement of data. The logical record to be stored is logically divided into a number of physical record portions to each of which is prepended a key with a unique sequence number. By starting from one end of the record with the key of highest sequence number and copying the physical record consisting of key plus data into the data set, successive physical records can be assembled in situ by overwriting the previous record's data portion with the current record's key. This ensures that the split logical record data need only be moved once as it is transferred to non-volatile storage as physical records of the data set. The original logical record can be reassembled by reversing the above procedure.