LOCK (Lock a Data Area)

The LOCK function allows you to back up a data area, specifically a compressed data area, while the MUF is running. By granting this request, DBUTLTY inhibits an update that moves data records until the UNLOCK function is issued. See UNLOCK (Unlock a Data Area) for information.

A lock, when granted, remains in effect until an unlock is done or the MUF is terminated. If you request a lock on an already locked area, your request waits until the first lock is released and then is granted, thereby locking the area again.

Note: Any Index Area and data area buffers with pending writes are written to DASD for the specified area when this function is executed.

The LOCK function communicates with one MUF. Be aware of the following:

Ensure that DBUTLTY is communicating with the desired MUF by executing DBUTLTY with the same System Identifier module (DBSIDPR) that is being used by the MUF, and
Ensure proper load library concatenation by keeping the System Identifier modules (DBSIDPR) in separate load libraries.

If the z/OS Cross-System Coupling Facility (XCF) is being used, ensure that the TOGROUP DBSIDPR parameter is correctly defined. See the CA Datacom/DB Database and System Administration Guide for more information on XCF.