Function

To temporarily halt offload device activity so that the operator can reset the work selection criteria for the associated transmitters and/or receivers.

Parameters

n

The number (1-8) of the offload device that is halted.

Authority Required

This command requires device authority. The description of the $T RDRnn command explains how to ensure that the authority of the appropriate MVS™ system command group is assigned.

This command requires update security access authority. For a description of assigning command input authority, see z/OS JES2 Initialization and Tuning Guide, SA32-0991.

Processing Considerations

• This command does not cause the offload data set to be deallocated.
• If you issue the $Z command during the transmit operation, any active transmitter(s) will finish processing their current work before JES2 halts the selection process.

  If you issue the $Z command during the receive operation, JES2 immediately halts any active receivers in the middle of the jobs being processed. When you restart the receive operation, the offload device will begin to read the offload data set at the point where it was halted.

• To restart the selection process, issue the $S OFFLOADn command for the type of operation (transmit or receive) that has been halted.

Scope

Single member. This command will be in effect for this member only. There is no need to have this command issued to all members of the MAS.

Messages

The $HASP000 message indicates the command was accepted.

JES2 temporarily halts activity for offload devices 3 and 6.