|
|
|
|
|
The IOA Functional monitor is used to direct certain types of requests to the central interface module. These requests include:
Note: If the IOA Functional monitor is not installed and active, automated tape library requests from the online screens and retry requests are not processed. For more information, see the INCONTROL for z/OS Installation Guide, and "Sites With No IOA Functional Monitor Installed" in Sample Uses For Exit 8.
Requests From Control-M/Tape Online Screens
Most automated tape libraries require APF authorization for action requests. However, the Control-M/Tape online screens do not have APF authorization. For this reason, requests for automated tape library access from an online screen must be routed to the IOA Functional monitor, which invokes an APF-authorized environment and sends the necessary requests to the central interface module.
Requests from an online screen may indicate that a tape should be scratched, activated or ejected, due to an option in the Control-M/Tape Inquire/Update screen.
Retry Requests
If an automated tape library interface module fails to access the automated tape library, the failure is detected by Control-M/Tape and a retry request for this operation is sent to the IOA Functional monitor through the Trace file. The IOA Functional monitor then starts a retry mechanism that attempts to pass the request to the automated tape library through the central interface module. Retry requests are submitted for an action until either a successful attempt or a retry limit is reached.
Note: A retry is not attempted if the failure is "volume not found". Exit 8, described below, can be used to limit the number of times a specific action can be retried.
Parent Topic |