Manage Data Blocks | Teradata Vantage - 17.00 - 17.05 - About Managing Data Blocks - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Database Administration

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
17.05
Published
June 2020
Language
English (United States)
Last Update
2021-01-22
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A data block is the unit of physical I/O when Teradata Vantage writes data to disk. A data block contains one or more data rows from the same table. The system stores data blocks in segments, which are grouped in cylinders. You can set data block sizes for tables using SQL or set them globally using the DBS Control utility. If there is a conflict between the data block size value set for the system and for the table, the table value overrides the global value.