CICS multi region operation (MRO) on z/VSE
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Many of our z/VSE users split their online environment into multiple CICS regions (partitions) and connect them via CICS MRO (CICS multi region operation). It's a function of CICS TS for VSE. In z/VSE CICS MRO is based on the cross-partition communication (XPCC) function provided by the z/VSE operating system.
With MRO you may use
With the above capabilities and MRO you may implement terminal (TOR), application (AOR) or file owning (FOR) regions.
There are multiple reason for implementing a TOR, AOR or FOR, e.g.
However, be careful when splitting up CICS partitions. You need to consider the performance characteristics of MRO. E.g. performance may be degraded caused by the communication between the two CICS regions.
More details are in the corresponding CICS TS for VSE documentation, e.g. in the Intercommunication or Performance Guide. You can find those books here.
... and there is an old CICS TS performance document, which still provide some useful performance information - here.