Request Parallelism
Request parallelism is multidimensional in Teradata Database. Among the more important of these dimensions are:
Teradata Database request parallelism is enabled by the hash distribution of rows across all AMPs in the system (see “Data Placement to Support Parallel Processing” on page 26). All relational operations perform in parallel, simultaneously, and unconditionally across the AMPs, and each operation on an AMP is performed independently of the data on other AMPs in the system.