Rational Developer for System z
Enterprise COBOL for z/OS, Version 4.1, Compiler and Runtime Migration Guide


STEPLIB

You can choose to phase in Language Environment gradually by using the STEPLIB approach. When you STEPLIB to the Language Environment run time, you phase in one region (CICS or IMS), batch (group of applications), or user (TSO) at a time.

Although using STEPLIB means changing your JCL, a gradual conversion can be easier than moving all of your applications at one time. Also note that when using STEPLIB, programs will run slower than when they access the runtime library through LNKLST/LPALST and more virtual storage will be used.

Note: If you have multiple processors linked together with channel-to-channel connections, you must treat the entire system as one processor and should migrate subsystem by subsystem. In addition to revising your JCL to STEPLIB to the Language Environment run time during initial setup, you might also need to specify CEEDUMP DD if the default allocation for CEEDUMP does not meet your shop's needs. (CEEDUMP is the ddname where Language Environment writes its dump output.) For default CEEDUMP destinations, see Language Environment formatted dumps.

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