Audit trail constraints--using DASD-only logstreams

If you are running BTS in a sysplex, the activities that make up a process may run on different CICS® regions. If you want to use audit logging, you should ensure that audit records can be written to a single logstream from any region that any of the activities run on.

If the CICS regions are in the same MVS™ image, you can define the logstream to use either a coupling facility structure or DASD-only logging. However, if the CICS regions are on different MVS images, the logstream should use a coupling facility structure rather than DASD-only logging. This is because CICS regions on different MVS images cannot access the same DASD-only logstream at the same time.

If the regions are in different MVS images and you use DASD-only logging, you will not be able to use shared logstreams for your BTS logs. This means that audit records for a single process may be split across several logstreams; you will have to collate them yourself.

Related concepts
Introduction to BTS audit trails
Audit trail examples
Related tasks
Specifying the level of audit logging
Using the audit trail utility program, DFHATUP
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