IBM Mainframe Forum

the scenario is like this. one KSDS file has to used by both online and batch program . what is the logic?

the scenario is like this. one KSDS file has to used by both online and batch program . what is the logic?

As long as the KSDS data set is read-only to online and batch, there are no issues and allocate the file in batch with DISP=SHR. If you want online OR batch to update the data set, you will some issues but they can be resolved by using an enqueue / dequeue method in both batch and online. If you want online AND batch to update the data set, you will have major issues since CICS often holds the buffers for a period of time before updating the data set.

KSDS might be IAM file. IAM can be used by both online and batch.

With the right SHAREOPTIONS, VSAM can be used both in online and batch at the same time -- as long as not more than one batch job or CICS region is attempting to update the data set; any number can be reading it. IAM is not required for this capability -- it is inherent in the SHAREOPTIONS used for the VSAM data set.