The IODF - It's Ins and Outs
Project and Program: Enterprise-wide
, zNextGen Project
, SHARE Sacramento 2018
The Input/Output Definition File (IODF) is the set of logical configuration statements created using the Hardware Configuration Definition (HCD) feature of z/OS. These statements are used to define a network of logical and hardware resources generally available to both the z/OS operating system (OSCP) at IPL Time and the z System platform hardware (IOCP/IOCDS) during a z system Power-On-Restart (POR).
Because of its vital role in shaping the z System operational environment, the IODF should be viewed as a major Control Point, deserving of heightened security, for its high informational value in shaping and maintaining the accuracy and integrity of the z/OS Operating System and its associated z System Hardware Platform (The IBM Mainframe).
In this session, the presenter will first examine the origin of the IODF, delineating its major components - Input Output Configuration Program (IOCP), Operating System Control Program (OSCP) and Switch Control Program (SWCP) - including major syntactical elements. Next, the presentation will focus on the use of the IODF data set in defining the z System Logical Partition (LPAR) configuration(s) and those device access paths that will be available to a specific instance of z/OS IPL’ed within those LPARs. Finally, the relationship of the LOADxx Parmlib Member to the IODF, specifically the OSCP and the LOADxx “configidâ€? and others, will be examined in detail.-Paul Robichaux-NewEra Software, Inc.
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