I want to run CICS transaction server(TS) 1.3 and CICS 4.1 on the same LPAR. For compatibility, can I run with the TS 1.3 SDFHLPA in the LPALIST and the type 6 SVC in the Nucleus? Will this cause any problems with CICS 4.1? Is there a recommended way to run the two in the same LPAR?
However, you cannot share LPA resident modules in this fashion. One of the regions must use LPA=NO and the other run with LPA=YES in the MVS image. I'd suggest running your existing 4.1 regions with LPA=NO for a day or two to determine the performance impact. Then, if this is acceptable, use LPA=YES in the (newer) CTS 1.3 region as this is where you will get the best benefit. Otherwise, use LPA=NO in the CTS 1.3 region and then only go to LPA=YES (with an IPL!) when all the 4.1 regions have gone away.
CICS Technical Strategist -- CICS expert at Search390.com
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This was first published in April 2003