PREDICTING VALIDITY OF DATA REPLICATION PRIOR TO ACTUAL REPLICATION IN A TRANSACTION PROCESSING SYSTEM

Validating a write of a replica record to a replica data store in a transaction processing system. The source record is written to a location in the source data store, and the location is recorded in a transaction log file. The transaction processing system obtains from the transaction log file the location, and the location in the replica data store to which the replica record will be written is predicted, based on the location and length of the previous replica record. If the obtained location of the source record corresponds to the predicted location of the replica record location, the replica record is written to a location in the replica data store.