For any active transaction, there is always only one recovery unit journal for local files. Remote files are an exception to this rule. Each remote file associated with a transaction has its own recovery unit and recovery unit journal. The recovery unit journal resides on the remote system. The volume is chosen in the same way as for local files.
Remote files have no effect in determining where the local recovery unit journal resides.
A journal is not deleted when the transaction has been completed. Recovery unit journals are automatically deleted only when all of the files involved in the transaction are closed and the application exits. RMS journaling automatically creates a recovery unit journal at run time, whenever the first record stream associates with a transaction. All record streams in the process associated with the same transaction share a single recovery unit journal. Once a recovery unit journal is created, it can be reused for another transaction by the process that created it.