17.10 - Deferred Transaction Recovery - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Database Utilities

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Configuration
Publication ID
B035-1102-171K
Language
English (United States)

If the Teradata system crashes, a COLD restart is activated and an online transaction recovery or deferred recovery is started. The only time a deferred recovery is not done is when the operator enters a COLDWAIT restart.

Deferred transaction recovery allows new transactions to come in from the connected hosts. The process of bringing the Teradata system up after a crash causes the locks to be set. If new transactions should attempt to reference the inconsistent data of the to-be-rolled-back transactions, they are blocked until the recovery process restores the data and releases the lock.