Journaling May Not Be Necessary
When you execute an application in local mode, that application is the only one that has access to any areas it updates. Therefore, journaling may not be necessary in local mode, provided you backup the database files before and after executing an application that updates the database. Typically, you journal in local mode when your database is too large to backup in a reasonable amount of time.
Must Use Tape Journals in Local Mode
To journal in local mode, you must use a DMCL that defines a tape journal file. You can assign the tape journal file to either a disk or tape device. However, if you journal to a disk device, you must copy the file to a tape device before using it in a manual recovery operation.
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