Logger systems define the MVS™ System Loggers used by your CICS® regions that you want to report against. They are identified by an arbitrary name and optionally qualified by the MVS Image where they run. The Logger system name is not a formal name associated with any aspect of your CICS System Logger set-up such as Logstream name, but simply a name you choose to identify this system by.
Defining Logger systems allows you to run the Logger report which presents a detailed analysis of the Logstreams and coupling facilities used by your CICS regions.
You can define SMF files to Logger systems. These files contain the System Logger (SMF 88) data for that system. When this system is requested for reporting, CICS PA builds JCL that includes DD statements for these files.
You can also define Logger systems to Groups. This allows you to connect a Logger system to the CICS systems it services. See Groups for more information.