This section illustrates the differences between using function shipping and using shared data table services to access a CICS® file in another region.
Figure 1 shows the use of function shipping to access a data set owned by another CICS region.
Figure 2 shows how a number of AOR’s can use cross-memory services to execute reads or browses, using shared data table services in an FOR in order to access the data table. (Function shipping is used for update requests and for any request that needs to access the source data set, in the same way as shown in Figure 1.)