ENABLE SESSION RESERVE - Teradata Director Program

Teradata® Director Program Reference - 17.20

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
Lake
VMware
Product
Teradata Director Program
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2023-11-17
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Product Category
Teradata Tools and Utilities

Purpose

Causes TDP to reserve session capacity for use in the event of a failure of a session processor (SP). This reserve reduces the maximum number of sessions TDP can control during its current run.

Syntax



Usage Notes

When TDP starts, the Session Reserve is enabled. If the Session Reserve has been subsequently disabled with the DISABLE SESSION RESERVE command, you can use the ENABLE SESSION RESERVE command to enable the Session Reserve again.

When Session Reserve is enabled and more than one SP is operational, TDP reserves a number of sessions equal to the capacity of one SP. This is to ensure that if a single SP fails, its sessions can be switched to other SPs that were started by this TDP.

This command affects the value of “SEVER MAXSESS”, as displayed in the output from the DISPLAY TDP command. This is a separate limit from the value of “TDP MAXSESS”, which is controlled by the SET MAXSESS command. The maximum number of sessions that can be logged on through this TDP is the lower of these two values.

When the maximum number of sessions is already logged on to TDP, any new logon request from an application is refused with an error code of CLI0513.

Example: ENABLE SESSION RESERVE

ENA SESSION RES

Completion Message

TDP400 SESSION RESERVE: ENABLED