SYS1.PROCLIB must contain an initiator cataloged procedure (named INIT) to create job address spaces for both JES2 and WLM managed initiators. JES2 and WLM use the MVS™ START command or the MVS ASCRE macro to create a system initiator. You can control the number of JES2 initiators by starting and stopping initiators. You cannot control the WLM initiators directly with operator commands.

Figure 1 illustrates the initiator cataloged procedure as supplied by IBM®: