The following chart summarizes the environments available with the adapter:
|
IMS Component |
DFSRRC00 or DFHDRP Loads: |
Mode |
Advantages |
Disadvantages |
|---|---|---|---|---|
|
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 |
No MSDB databases |
|
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 |
Does not retrieve updated records Needs communication resources Needs duplicate PCBs for multiple users No Fast Path |
|
DFSRRC00 (Invoking the Interface in BMP Mode: PARM='BMP,FOCUS,psbname') |
FOCUS |
BMP |
Accesses online databases Quicker access than XMI server No communication resources Accesses Fast Path |
Needs IMS control region running |
|
DFSRRC00 (Invoking the Adapter in DLI Mode: PARM='DLI,FOCUS,psbname') |
FOCUS |
DLI |
No IMS control region Quicker access than XMI server No communication resources |
No Fast Path Does not retrieve updated records |
| Information Builders |