To indicate that a DISK file is to run under commitment control, enter the keyword COMMIT in the keyword field of the file description specification.
When a program specifies commitment control for a file, the specification applies only to the input and output operations made by this program for this file. Commitment control does not apply to operations other than input and output operations. It does not apply to files that do not have commitment control specified in the program doing the input or output operation.
When more than one program accesses a file as a shared file, all or none of the programs must specify the file to be under commitment control.