17.10 - DisableRestartableBLC - 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)

Determines whether a block-level compression (BLC) operation that is interrupted by a database reset will resume automatically when the system restarts.

Field Group

General

Valid Settings

Setting Description
TRUE Disables restartable BLC. If a BLC compress or uncompress operation is interrupted by a system reset, the operation will not continue when the system restarts, and tables may be left in partially compressed states.

Additionally, BLC compress and uncompress operations are not allowed if there are any down AMPs in the current Ferret scope.

FALSE Enables restartable BLC. If a BLC compress or uncompress operation is interrupted by a system reset, the operation continues automatically when the system restarts.

Additionally, BLC compress and uncompress operations are allowed, even if there are down AMPs in the current Ferret scope.

Default

FALSE

Changes Take Effect

After the DBS Control Record has been written.

Usage Notes

If the value of this field is TRUE, and tables become partially compressed, you can use the COMPRESS and UNCOMPRESS commands to make the table state consistent. For more information see Ferret Utility (ferret).

Enabling restartable BLC requires that the NoDot0Backdown field be TRUE, which prevents the system from being backed down to the previous release level.