Modules

Figure 46 shows the modules for XRF.

Figure 46. Extended recovery facility support
 The three top-level components of XRF shown in the diagram are: CAVM interface support (DFHXRA). CAVM surveillance. CAVM message management (DFHWMS), which uses the PUTMSG service (DFHWMP1) and the GETMSG service (DFHWMG1). The CAVM interface support module involves the surveillance transaction (DFHXRSP), which has a sub-component DFHCXCU, the catch-up transaction, which in turn uses the CICS catch-up transaction DFHZXCU and the DBCTL catch-up transaction DFHDXCU. CAVM interface support also involves the DBCTL surveillance transaction (DFHDBCR), the switch transaction (DFHXTCI), the CEBT transaction (DFHXRCP) and CAVM state management.
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