15.00 - Hash Maps - Teradata Database

Teradata Database Design

Product
Teradata Database
Release Number
15.00
Content Type
User Guide
Publication ID
B035-1094-015K
Language
English (United States)

Hash Maps

A hash map is a mechanism for determining which AMP a row is stored on, or, in the case of the Open PDE hash map, the destination AMP for a message sent by the Parser subsystem. Each cell in the map array corresponds to a hash bucket, and each hash bucket is assigned to an AMP. Hash map entries are maintained by the BYNET.