Change System State | Teradata Business Continuity Manager - Changing States with bcmadmin - Teradata Business Continuity Manager

Teradata® Business Continuity Manager User Guide - 1.01.01

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Teradata Business Continuity Manager
Release Number
1.01.01
Published
March 2023
Language
English (United States)
Last Update
2023-03-13
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qra1653979755546.ditamap
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B035-2550
lifecycle
previous
Product Category
Analytical Ecosystem

Teradata System State Changes

You can change the state of Teradata systems with bcmdmin. The Teradata system state must be Active, Standby, or Read-Only to start sessions on the Teradata system. The following table shows how to change Teradata system accessibility and Business Continuity Manager states.
From To Commands
Active Standby SYSTEM DEMOTE
Standby Active SYSTEM PROMOTE

To Active State Commands

The following table describes how to place a Teradata system or table in Active state from another state.
To Active from Commands
Out of Service SYSTEM RECOVER
Standby SYSTEM PROMOTE
Read-Only SYSTEM RECOVER
If a table is in a Restore state, it automatically goes into an Active state when recovery is complete.

From Active State Commands

From Active state, a Teradata system or table can be placed into the following states.
From Active to Commands
Unrecoverable SYSTEM DEACTIVATE
Out of Service SYSTEM HALT
Read-Only SYSTEM FREEZE
Standby SYSTEM DEMOTE
From an Active state, a system is automatically placed in Restore state if the queue of pending Write requests is greater than the RecoveryQueueLimit parameter. This prevents the system from getting reads directed to it when it is far behind in writes, allowing the system time to catch up with the other systems in the cluster.