Synchronization of Parallel Operations
Synchronized Table Scans
Teradata Database system architecture is not only inherently parallel, but it is also highly optimized to synchronize its parallel operations to effect further performance optimizations.
One of the more recent additions to the Teradata Database parallel processing story is synchronized scanning of cached large tables. Synchronized scanning permits new full table scans to begin at the current point of an ongoing scan of the same table, thus avoiding any I/O for the subsequent scans. Because synchronized scans might not progress at the same rate, any task can initiate the next read operation.