Components of a Teradata System
We have looked at the overall node, and now we will describe the
components that make up a node in detail.
Parsing Engine (PE)
The Parsing Engine (PE) is a component that interprets SQL requests,
receives input records, and passes data. To do that it sends the
messages through the BYNET to the AMPs.
BYNET
The BYNET is the message-passing layer. It determines which AMP(s)
(Access Module Processor) should receive a message.
Access Module Processor (AMP)
The AMP is a virtual processor (vproc) designed for and dedicated to
managing a portion of the entire database. It performs all database
management functions such as sorting, aggregating, and formatting data.
The AMP receives data from the PE, formats rows, and distributes them to
the disk storage units it controls. The AMP also retrieves the rows
requested by the Parsing Engine.
Disks
Disks are disk drives associated with an AMP that store the data rows.
On current systems, they are implemented using a disk array.
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