John McKown wrote:

>​_You_ cannot because, IIRC, you are not a sysprog who can install exits.
>Either the IKJEFLD or IKJEFLD1 exit ​can be used to set the "Don't ENQ" bit
>in the control switches. Normally, TSO does a ENQ on your RACF id as a
>resource name and a queue name of SYSIKJUA. This is what is used by TSO to
>prevent multiple logons to the same ID. In my shop, I have an RNL which
>changes this ENQ from a SYSTEMS (sysplex wide) ENQ to a SYSTEM (individual
>image) ENQ __for specific RACF ids__. 

Thanks for clarifying Paul's question. I got sidetracked somehow while 
answering Paul and Thomas posts.

This statement below will allow you many sessions in SysPlex, but ONE session 
per LPAR with a RACF id.

RNLDEF RNL(EXCL) TYPE(SPECIFIC) QNAME(SYSIKJUA) RNAME(<id or wildcard>) 

You will have to review your temp dsn naming standards.

>...  this ENQ was a fast patch which never was addressed. 

Still not addressed AFAIK.

Groete / Greetings
Elardus Engelbrecht

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