Using Host Utility Locks - Teradata Tools and Utilities

A Host Utility (HUT) lock, also referred to as a utility lock in this book, is the lock that Teradata ARC places when most Teradata ARC commands are executed. Exceptions are CHECKPOINT, DELETE DATABASE, and DELETE JOURNAL. When Teradata ARC places a HUT lock on a object, for example, with an ARCHIVE or RESTORE command, the following conditions apply:

• HUT locks are associated with the currently logged-on user who entered the statement, not with a job or transaction.
• HUT locks are placed only on the AMPs that are participating in a Teradata ARC operation.
• A HUT lock that is placed for a user on an object at one level never conflicts with another level of lock on the same object for the same user.