Multiregion operation
For CICS-to-CICS communication, CICS® provides an interregion communication facility that does not require the use of a network access method such as ACF/SNA or TCP/IP.
This
form of communication is called multiregion operation (MRO).
MRO can be used between CICS regions
that reside:
- In the same z/OS® image
- In the same z/OS systems complex (sysplex).
CICS Transaction Server for z/OS can
use MRO to communicate with:
- Other CICS Transaction Server for z/OS systems
- CICS Transaction Server for OS/390® systems
Note: The external CICS interface
(EXCI) uses a specialized form of MRO link to support:
- Communication between MVS™ batch programs and CICS
- DCE remote procedure calls to CICS programs