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What are the different types of vprocs available in Teradata

AMP

Access module processors perform database functions, such as executing database
queries. Each AMP owns a portion of the overall database storage.

GTW

Gateway vprocs provide a socket interface to Teradata Database

Node

The node vproc handles PDE and operating system functions not directly related
to AMP and PE work. Node vprocs cannot be externally manipulated, and do not
appear in the output of the Vproc Manager utility.

PE

Parsing engines perform session control, query parsing, security validation, query
optimization, and query dispatch.

RSG

Relay Services Gateway provides a socket interface for the replication agent, and for relaying dictionary changes to the Teradata Meta Data Services utility.

VSS

Manages Teradata Database storage. AMPs acquire their portions of database
storage through the TVS vproc.

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