IBM i Journaling Management

Journal management provides a means by which you can record the activity of objects on your system. When you use journal management, you create an object called a journal. The journal records the activities of the objects you specify in the form of journal entries.

The primary benefit of journal management is that it enables you to recover the changes to an object that have occurred since the object was last saved. This ability is especially useful if you have an unscheduled outage such as a power failure.

You can journal the objects that are listed below:

Libraries, Database physical files, Access paths, Data areas, Data queues, and Integrated file system objects (stream files, directories, and symbolic links).

Useful Journaling Commands

CRTJRN command creates a journal as a local journal with the specified attributes and attaches the specified journal receiver to the journal. Once a journal is created, object changes can be journaled to it or user entries can be sent to it.

WRKJRNA Command displays or prints the creation and operational attributes of a journal, including the name of the journal receiver currently attached to the journal. From the primary display, options or functions can be selected to display the names of all objects currently journaled to the journal, the names of all remote journals currently associated with this journal, and detailed information about a remote journal, the receiver directory, or detailed information about a journal receiver; or to delete receivers from the receiver directory.

CHGJRN command changes the journal receiver, the journal message queue, the manage receiver attribute, the delete receiver attribute, the receiver size options, the journal state, allowing minimized entry specific data, journal caching, the journal receiver’s threshold, the journal object limit, the journal recovery count, or the text associated with the specified journal. The command allows one journal receiver to be attached to the specified journal. This replaces the previously attached journal receiver. The newly-attached journal receiver begins receiving journal entries for the journal immediately.

CRTJRNRCV command creates a journal receiver. Once a journal receiver is attached to a journal (with the Create Journal (CRTJRN) or Change Journal (CHGJRN) command), journal entries can be placed in it.

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