Teradata ARC Locks During a Restore Operation
A restore operation uses an exclusive HUT lock when data tables are restored.
Restoring Tables
If the RELEASE LOCK keyword in the RESTORE statement is specified and that statement specifies that selected tables are to be restored, Teradata ARC releases the exclusive HUT lock on each table as soon as it finishes restoring it.
Restoring a Journal Table
When a journal table is restored, Teradata ARC places a write HUT lock on the table. The restored journal table and the journal table that is recording changed rows are different physical tables. Consequently, the write HUT lock exerted by a journal table restore does not prevent change images from recording to the journal table. The write HUT lock only prevents concurrent restore operations to the same journal.