- You can change the program writing the records to include a field holding the user's logon ID.
- As you mentioned in your question, you can enable journaling for the file in question. If this is a standard VSAM file you just have to change the file's RDO definition to specify what types of I/O's are to be logged and the log stream name. If it is a record level sharing (RLS) dataset, you should first redefine the file with LOG(ALL) and a valid log stream ID. Finally, you must create a journal model (JMODEL) definition for the target logstream.
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