The 'Start' job entry
Start defines the starting point for job execution. Every job must have one (and only one) Start. Unconditional job hops only are available from a Start job entry.
The start job entry settings contain basic scheduling functionality; however, scheduling is not persistent and is only available while the device is running.
The Data Integration Server provides a more robust option for scheduling execution of jobs and transformations and is the preferred alternative to scheduling using the Start step. If you want the job to run like a daemon process, however, enable Repeat in the job settings dialog box.
Note: The basic scheduling functionality and the repeat option are only functional within the main job and not within a sub job.