Checkpoint options control how often a row is written to the checkpoint file for the purposes of restarting a job. Unless otherwise specified, a checkpoint is taken at the start of and at the end of the input data. Since this process does not provide granular restartability in the case of longer running jobs, checkpoint intervals can be user-specified in terms of seconds using the command line option -z.
For example, the following command indicates that a checkpoint will be taken every 120 seconds:
tbuild -f <script file name> -z 120