Nonrecoverable full-function databases

You can define a full-function database as nonrecoverable in the RECON data set by using DBRC commands.

When a full-function database is defined as nonrecoverable, each time the data in the database is updated, IMS logs only the data as it exists before the update. IMS does not log the data as it exists after the update. For this reason, you can backout updates to a nonrecoverable full-function database, but you cannot recover a database by reapplying updates to a prior image copy of the database.

This before image of the data from nonrecoverable full-function databases is logged in type X'50' log records.

You can use the NONRECOV keyword on either of the DBRC commands INIT.DB or CHANGE.DB to define a database as nonrecoverable.