The utility described is not available for as-a-service customers.
The Vproc Manager utility, vprocmanager, allows you to manage the virtual processors (vprocs) in an Database Engine 20 system. Vprocs are a set of software processes that run under Teradata Parallel Database Extensions (PDE) within the multitasking environment of the operating system. Vprocs are the heart of Database Engine 20, managing the basic functions of the system.
Database Engine 20 systems can include the following vproc types.
| Vproc Type | Description |
|---|---|
| AMP | Access module processor. Performs database functions such as executing database queries. Each AMP owns a portion of database storage. |
| GTW | Gateway vproc. Provides socket interface to Vantage. |
| Node | Handles PDE and operating system functions not directly related to AMP and PE work. Cannot be externally manipulated. Does not appear in Vproc Manager utility output. |
| PE | Parsing engine. Does session control, query parsing, security validation, query optimization, and query dispatch. |
| RSG | Relay Services Gateway. Provides socket interface for communication with Teradata Data Stream Architecture (DSA). |
| TVS | Teradata Virtual Storage. Manages Vantage storage. AMPs acquire their portions of database storage through the TVS vproc. |
Vproc Manager allows you to perform the following:
- Obtain the status of some or all of the vprocs
- Change vproc states
- Initialize and boot one or more specified AMP vprocs
- Initialize the storage associated with one or more specified AMP vprocs
- Force a database restart
Vproc Manager can be used with the Table Rebuild utility to initialize and boot a specific AMP vproc in order to rebuild the portion of all tables associated with the vproc.