UNIX Dubbed Address Space Data workspace

The Dubbed Address Spaces workspace contains information about all z/OS address spaces that have been marked as being a user of UNIX System Services requests. Such address spaces are referred to as “dubbed”.

Dubbing is the process of making an address space known to the z/OS UNIX System Services kernel. Address spaces created by fork() are automatically dubbed when they are created. Other address spaces become dubbed if they invoke a z/OS UNIX service, either directly or indirectly. Indirectly means that the address space does not itself invoke the OS/390 UNIX System Services APIs, but uses an application that does. For example, address space MYJOB does not directly use the z/OS UNIX System Services APIs. Howver, it does use TCP/IP running on the current version of z/OS. Since this version of TCP/IP uses the z/OS UNIX System Services APIs, address space MYJOB is dubbed and is included in the Address Spaces workspace.

This workspace contains two views. The CPU Time % bar chart shows the percentage of CPU time used by each dubbed address space. The UNIX Address Spaces table view provides further information about those address spaces, including the name of the address space; the type of address space, batch, started task, or TSO user; the TSO userid associated with the address space; and the service class (if the system is in goal mode) or performance group (if the system is in compatibility mode) of the address space. For a batch job or started task, the name of the address space is the jobname from the job statement. For a TSO address space, this is the user ID of the logged-on user. The address space name may also have been generated by z/OS UNIX System Services.

You can link to this workspace from the z/OS UNIX System Services Overview workspace and the UNIX Processes workspace.

You can link from this workspace to the UNIX Processes workspace to see information about the processes running in a selected address space.

This workspace can report historical data.