The CL command STRCMTCTL notifies the system that you want to start commitment control.
The LCKLVL(Lock Level) parameter allows you to select the level at which records are locked under commitment control. See Commitment Control Locks and the CL Programming manual for further details on lock levels.
You can make commitment control conditional, in the sense that the decision whether to process a file under commitment control is made at run time. For further information, see Specifying Conditional Commitment Control.
When you complete a group of changes with a COMMIT operation, you can specify a label to identify the end of the group. In the event of an abnormal job end, this identification label is written to a file, message queue, or data area so that you know which group of changes is the last group to be completed successfully. You specify this file, message queue, or data area on the STRCMTCTL command.
Before you call any program that processes files specified for commitment control, issue the STRCMTCTL command. If you call a program that opens a file specified for commitment control before you issue the STRCMTCTL command, the opening of the file will fail.
The CL command ENDCMTCTL notifies the system that your activation group or job has finished processing files under commitment control. For further information on the STRCMTCTL and ENDCMTCTL commands, see the CL and APIs section of the Programming category in the i5/OS Information Center at this Web site - http://www.ibm.com/systems/i/infocenter/.