15.00 - Request Parallelism - Teradata Database

Teradata Database Design

prodname
Teradata Database
vrm_release
15.00
category
User Guide
featnum
B035-1094-015K

Request Parallelism

Request parallelism is multidimensional in Teradata Database. Among the more important of these dimensions are:

  • Query parallelism
  • Within‑step parallelism
  • Multistep parallelism
  • Multistatement request parallelism
  • 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.