Parallelization is not happening using asychnronous RFC in a function module

[former_member423626]

A BW data source ZTEST
has been created based on a function module ZTEST_FM to pull the
data into BW system from R/3.

(Have checked the parellel jobs running in SM66 transaction).

Inside the function module, an RFC function
module ZTEST_RFC1 has been called asynchronously to implement the parallelization
to improve the data extraction time into BW system.

Note: In this scenario asynchronous
RFC is used to implement the parallel processing.

The logic in the function module is as follows.

Function module ZTEST_FM Logic:

• Fetch data from HRP1000 table into an internal table IT_HRP1000 for
  OTYPE = ‘TN’.
• Loop at IT_HRP1000 into work area (WA).
• Call the RFC asynchronously by passing OBJID,OTYPE and ENDDA,
• Calculate SOBID which is the required output field from the RFC
  function module.
• Populate the results into final internal table E_T_DATA.

The output structure contains the following fields.

• OBJID
• BEGDA
• ENDDA
• SOBID

Could you please give us some suggestions, to implement the parellel processing using asychronous RFC in this scenario.

Would appreciate your help.

[iotatau]

Your RFC call looks correct. For collecting the result you will need to code the callback routine Write_E_T_data. Inside the callback you can use the statement

RECEIVE RESULTS FROM FUNCTION ZFHLS_EX_TNM_ACADEMY_RFC1 IMPORTING <parameter list>

to retrieve the calculated result. For the declaration of the callback routine I recommend

FORM Write_E_T_data USING iv_name TYPE c.

The parameter iv_name containing the name of the RFC task turned out to be mandatory in my tests.

[former_member423626]

Thank you Jochen for your reply,

I have implemented the RECEIVE RESULTS FROM FUNCTION ZFHLS_EX_TNM_ACADEMY_RFC1

in the function module in WRITE_E_T_DATA sub routine.

but main issue is the jobs are not running in parellel.

i.e. jobs running synchronously.

[iotatau]

Have you checked with transaction RZ12 if any parallel server group has been configured on your system?

[former_member423626]

Yeah, have checked the RFC server group maintained in RZ12 transaction.

RZ12 server group name  is 'pararellel_generators'.

system = 'pararellel_generators'.

we tried the below two options.

DESTINATION IN GROUP system

DESTINATION IN GROUP DEFAULT.

but the issue remains same.

Thanks

Jay.

[iotatau]

I usually check my parallel jobs with SM50. Could it be that the calculation is so quick that the RFC call is finished before the next RFC request is issued? - Debugging parallel jobs is not easy. What I have done for my task is to create program logic to switch between synchronous or asynchronous/parallel execution. Whenever I have made major changes in the RFC code I first monitor a clean synchronous execution and only then switch to parallel execution. Note that you have to call the callback routine manually for synchronous execution.

[Former Member]

Hi Jayashankar,

Just want know, why WAIT statement is written before RFC call ? Usually WAIT will be written after RFC call to collect consolidated result in parallel processing . It seems like before calling  RFC call system will wait till previously called RFC So it will be like synchronous behavior. Please correct me if my assumption is wrong.

Thanks &  Regards,

Arun

[former_member423626]

Thank you Aruna Kumara K,

I have tried  by removing the statement WAIT UNTIL before the RFC CALL, now the jobs are executing in parellel.

Thanks again.

Regards,

Jay.