Computer system with checkpoint facility and accounting facility indicating charges payable for processes

摘要

In a computer system provided with a checkpoint facility, an accounting record indicating a charge payable as a result of a normal process and an accounting record indicating a charge payable as a result of a checkpoint process are output separately. When a file is accessed, a determination is made as to whether the access occurs subsequent to the checkpoint process and whether the accessed file has not been saved. If it is determined that the access occurs subsequent to the checkpoint process and the accessed file has not been saved, the accessed file is appended to the saved information.