Can Gen TIML listener run in CICS MRO (TOR/AOR/FOR) environment

Products

• Gen
• Gen - Run Time Distributed

Issue/Introduction

Using the Gen 8.6 CICS Multi Sockets Server Listener (TISRVMSL / TIML) under CICS Multiregion operation (MRO):

• Should TIML listener be running in CICS TOR (terminal-owning region) or can it also run in AOR (application-owning region)?
  
  
• Should EZACONFIG file be defined in the same region where listener is running?

Environment

Gen 8.6 Gen CICS Multi Sockets Server Listener

Resolution

• It is best for the TIML listener to run in the same CICS region as the Gen server applications that use that TIML. But that may not always be possible because the CICS transaction volume may require the use of multiple CICS regions.
  
  
• In such cases the TIML can start servers in other CICS regions different from where the TIML executes.
  
  
• The servers can be defined as remote (in RDO) or the distributed routing program can be used for dynamic routing. 
  
  
• Regardless of where the TIML executes, the Sockets Interface programs and transactions need to be defined in all CICS regions that use Sockets (TOR, AORs and FORs).
  
  
• All this needs to be in the same LPAR.