15.00 - AMP Ownership of Data - Teradata Database

Teradata Database Design

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

AMP Ownership of Data

Because of its shared-nothing architecture, each AMP in a Teradata system exclusively controls its own virtual disk space. As a result, each row is owned by exactly one AMP. That AMP is the only one in the system that can create, read, update, or lock its data. The AMP-local control of logging and locking not only enhances system parallelism, but also reduces BYNET traffic significantly. The following graphic shows how local autonomy provides each AMP (AMP 92 in this particular example) with total accountability for its own data.