Reorganization of spare parts database

Over the years, growing quantities of data in the spare parts database have led to increasingly poor performance of the online and batch systems. In addition, the memory requirements are increasing. The previous reorganization method, a PL1 program with multiple subprograms that cannot be executed individually, no longer satisfies the current functional and technical requirements. It is replaced with a multi-stage system that takes different data views into account. An improved backup strategy for the data enables both the rollback that results from a program termination and a functionally necessary, delayed rollback of the data. The archiving method is designed so that the actual archiving can be preceded by its simulation, for testing purposes. The associated job streams are functionally and technically autonomous and are requested as needed.