Considerations for creating log data sets

The information in this topic applies to the various DFSMShsm log data sets.

Ensure that the active DFSMShsm log and the active problem determination log are not allowed to migrate. To prevent migration of data sets, see z/OS DFSMShsm Storage Administration.under the heading “Controlling Migration of Data Sets and Volumes” for non-SMS-managed data sets, or under the heading “Specifying Migration Attributes” for SMS-managed data sets.

Before you can start DFSMShsm with the starter set, you need to define a volume for the various DFSMShsm log data sets. You also need to perform the following tasks:

Ensure that the log data sets are allocated on low-use mounted or private volumes to enhance the performance of DFSMShsm by reducing data set contention.
Ensure that the various DFSMShsm log data sets can be SMS managed so you can assign them to a storage class with the GUARANTEED SPACE attribute.