15.00 - Hash Map Lookup - Teradata Database

Teradata Database Design

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

Hash Map Lookup

When a row is hashed, the resulting hash bucket number points to a cell entry in a hash map. This entry defines the AMP to which the row hashes.

While the BYNET uses only the hash bucket number to distribute a row to its assigned AMP, the receiving AMP uses the entire rowID.