Abstract: The stream data processing system has an input server which accumulates input stream data to be migrated, instructs a migration source and a migration destination to perform data migration, transfers accumulated data to the migration destination in response to an accumulated data transfer instruction, then stops transferring data to the migration source, and transfers subsequent data to the migration destination subsequently to the transfer of the accumulated data. The migration source migrates both a query and an intermediate value that has been produced as a result of completion of execution of the query on input data. A migration destination server reads the accumulated data and the subsequent data that are transferred from the input server, skips reading the portions of these transferred data corresponding to and preceding the migrated intermediate value, and discards the output that is transferred from the migration source and precedes the query execution results.

Abstract: The stream data processing system has an input server which accumulates input stream data to be migrated, instructs a migration source and a migration destination to perform data migration, transfers accumulated data to the migration destination in response to an accumulated data transfer instruction, then stops transferring data to the migration source, and transfers subsequent data to the migration destination subsequently to the transfer of the accumulated data. The migration source migrates both a query and an intermediate value that has been produced as a result of completion of execution of the query on input data. A migration destination server reads the accumulated data and the subsequent data that are transferred from the input server, skips reading the portions of these transferred data corresponding to and preceding the migrated intermediate value, and discards the output that is transferred from the migration source and precedes the query execution results.

Abstract: An operation information prediction computer collects operation information from the at least one apparatus, and predicts future operation information on the at least one apparatus based on the collected operation information. The operation information prediction computer collects, from the at least one apparatus, state information including the operation information and configuration information on the at least one apparatus when the operation information is collected. The operation information prediction computer stores the operation information and the configuration information the storage area. The operation information prediction computer calculates a correlation value for associating past operation information stored in the storage area with current configuration information. The operation information prediction computer calculates a future operation prediction value based on the past operation information and the calculated correlation value.