What does CMPAT=YES mean in a PSB

gowtham_1982 · Active User Joined: 02 Dec 2005 Posts: 109

hi all,

can anyone clarify me what does CMPAT=YES mean in a PSB. i identify this option being specified in PSB's for components which have XRST and CHKP calls.

thanks in advance,

gowtham

rajesh_1183 · Posted: Wed Mar 22, 2006 4:44 pm

Hi Goutham,

"CMPAT=YES" is used to guarantee that the program using the PSB will always be given an IO-PCB at run time;which I think that we will be specifying a IO-PCB in the ENTRY stmt.

So,
If you specify CMPAT=Y, the PCB list contains the address of the I/O PCB, followed by any alternate PCBs, and then the DB PCBs.

If you do not specify CMPAT=Y, the PCB list contains the addresses of any alternate PCBs followed by the addresses of the DB PCBs.

Note: alternate PCBs is different from I/O PCB's

corrections welcomed....

Thanks,
Rajesh

gowtham_1982 · Active User Joined: 02 Dec 2005 Posts: 109

Hi Rajesh,

i do know that we need to specify an IO-PCB with CMPAT=YES. i need clarification what does this option signify? what it means?

regards,

gowtham

rajesh_1183 · Posted: Thu Mar 23, 2006 9:35 am

Hi Gowtham,

I think if CMPAT=YES is provided,then we should definitely specify the IO-PCB.If it is NO it might assume some dummy IO-PCB...

corrections welcomed....

Thanks,
Rajesh

gowtham_1982 · Active User Joined: 02 Dec 2005 Posts: 109

hi rajesh,

i get what you say. my question is, what does CMPAT=YES mean? why do we need to specify an IO-PCB for that?

kind regards,

gowtham

mbr_raja · Posted: Wed Apr 05, 2006 8:21 pm

If Compact=yes, then It's guaranteed as IMS DC program, and this PSB will be avialble only at the on-line.

amitchaudhary · New User Joined: 13 May 2005 Posts: 8

Hello all,

I found the following description on the net . may be it will will give you a more elaborate answer
"To test message processing or batch message processing programs in a batch processing region, use the CMPAT option of the PSBGEN statement. When CMPAT=YES is specified, IMS provides PCBs to the application as if it were executing in a message processing region. Using CMPAT eliminates the need to recompile the program between batch and online executions.

In the case of a batch program, no I/O PCB exists in the list unless you request it with the CMPAT option on the PSBGEN statement. Therefore, if CMPAT=YES is not specified, the PCB list provided to the program has a direct relationship to the PCBs within the PSB. No TP PCBs should be contained in a PSB for batch processing in a batch processing region.

In a TM batch environment, CMPAT=YES is implied and cannot be overridden by PSBGEN. The PCB list for application programs running in a DCCTL batch region always contains an I/O PCB.

you can check the same on this link
publib.boulder.ibm.com/infocenter/dzichelp/v2r2/index.jsp?topic=/com.ibm.ims.doc.urs/ie0u3mst04.htm

honeypria567 · New User Joined: 20 Nov 2006 Posts: 14 Location: chennai

Hi Goutham,

CMPAT=YES is used in CHKP,XRST CALLs

"CMPAT=YES" is used to guarantee that the program using the PSB will always be given an IO-PCB at run time;that will be specifying a IO-PCB in the ENTRY stmt.

If you specify CMPAT=Y, the PCB list contains the address of the I/O PCB, followed by any ALT- PCBs, and then the DB PCBs.

If you don't specify CMPAT=Y, the PCB list not contains the addresses of any ALT PCBs followed by the addresses of the DB PCBs.

Let me know if i was wrong.

Thanks,
Honey