Pre-allocating a checkpoint data set

In most cases, you can just let Application Performance Analyzer dynamically allocate and initialize the checkpoint file, which Application Performance Analyzer will try to do the first time the Application Performance Analyzer started task runs.

Your installation might have special requirements such as to what volume the checkpoint file is allocated, or under what SMS rules to allocate the checkpoint file.

Under these conditions, use the JCL provided in sample job CAZCHKPT in hlq.SCAZSAMP to pre-allocate a new checkpoint file prior to starting the Application Performance Analyzer started task for the first time. Application Performance Analyzer will detect the file and initialize it. To pre-allocate a checkpoint file, edit and submit member CAZCHKPT in hlq.SCAZSAMP. Consult the instructions in the sample job for more information.

The following rules apply to allocating the checkpoint file:
  1. The file must reside on a direct access device.
  2. It must not be allocated as a compressed format data set.
  3. It must not be allocated as an extended-format data set.
  4. The data set name (yourhlq.checkpointDSN) must conform to the rules specified in the “CheckpointDSN” parameter described in “CONFIG BASIC statement.” For more information, see CONFIG BASIC statement.
Parent topic: Customizing Application Performance Analyzer