In the distributed model used for BTS routing, each participating CICS® region might be both a routing region and a target region. A distributed routing program runs in each region. The distributed model has advantages and disadvantages.
Figure 1 shows a distributed
routing model. Figure 1. Dynamic routing using a distributed
routing model. Each region may be both a routing region
and a target region.
The distributed model applies to the routing of:
BTS processes and activities
Non-terminal-related EXEC CICS START requests.
The distributed model is a peer-to-peer system—each participating CICS region may be both a routing region and a target region. A distributed routing program runs in each region.
Advantage
of the distributed model
There is no single point-of-failure.
Disadvantages
of the distributed model
Compared to the hub model, there are a great many inter-region
connections to maintain.
You may have problems with distributed data. For example, any
data used to make routing decisions must be available to all the regions. CICSPlex® SM
solves this problem by using dataspaces.
