Summary Chart

The following chart summarizes the environments available with the Interface:

IMS or CICS Component	DFSRRC00 or DFHDRP Loads:	Mode	Advantages	Disadvantages
DBCTL (Access to IMS Through DBCTL)	n/a	n/a	Accesses online databases Provides security No XMI server No communication resources PCB sharing Dynamic PSB selection Works with DEDB databases Works with MSO	No MSDB databases Needs IMS 3.1 or up
DFSRRC00 (Initiating the XMI Server in BMP Mode: PARM='BMP,XMI ,psbname')	XMI server	BMP	Accesses online databases Accesses Fast Path Works with MSO	Needs IMS control region running Needs communication resources Needs duplicate PCBs for multiple users
DFSRRC00 (Initiating the XMI Server in DLI Mode: PARM='DLI,XMI, psbname')	XMI server	DLI	No IMS control region Works with MSO	Does not retrieve updated records Needs communication resources Needs duplicate PCBs for multiple users No Fast Path
DFHDRP (Initiating the XMI Server With Databases Under Control of CICS)	XMI server	n/a	Accesses online databases Works with MSO	Needs CICS control region running with DL/I SAS Needs communication resources Needs duplicate PCBs for multiple users No Fast Path Not available with IMS 5.1
DFSRRC00 (Invoking the Interface in BMP Mode: PARM='BMP,FOC US,psbname')	FOCUS	BMP	Accesses online databases Quicker access than XMI server No communication resources Accesses Fast Path	Does not work with MSO Needs IMS control region running
DFSRRC00 (Invoking the Interface in DLI Mode: PARM='DLI,FOC US,psbname')	FOCUS	DLI	No IMS control region Quicker access than XMI server No communication resources	Does not work with MSO No Fast Path Does not retrieve updated records