The log of logs is an MVS™ log stream created by CICS® TS that contains records that are written each time a file is opened or closed.
The log of logs helps CICS VR maintain an index of log data sets. CICS VR scans the log of logs and saves information needed for recovery in the RCDS.
Define a log-of-logs log stream that is shared among all CICS regions in the Parallel Sysplex®. This must be explicitly defined, because CICS does not support model log streams for dynamic creation of this log stream. Also define a journal model resource definition that references the log-of-logs log stream.
For more information about logging in CICS Transaction Server, see CICS System Definition Guide.