The DBS Control fields are grouped logically based on their use by Vantage, as shown in the following table.
| Group | Description |
|---|---|
| General | Miscellaneous settings that affect how Vantage operates. |
| File System | Settings that affect the file system. |
| Compression | Settings that affect data compression at the data block level. |
| Native Object Store or NOS |
Settings that affect access to foreign table data. Foreign tables allow Vantage to access data from external, cloud-based data storage, such as AWS S3, without requiring you to manually move the data into the database first from where it natively resides. Foreign tables are identified by a hostname, path, and other metadata that point to the external storage. Vantage can read and process semi-structured or unstructured external data in foreign tables using standard SQL. For example, you can use Teradata analytic functions to examine the data, join it to the relational data in the database, and issue queries against it as you can for other data in Vantage. |
| Performance | Settings that affect Vantage performance features. |
| Storage | Settings that determine the temperature assigned to data loaded into empty tables. The temperature corresponds to expected frequency of data access, and can be used to determine how data is stored. This group is visible only when temperature-based block-level compression is enabled, or on systems that have licensed Teradata Virtual Storage (VS).
|
| Checksum | Special diagnostic settings that are used to ensure the integrity of disk I/O operations on database tables. For information on the checksum group of settings, see Checksum Fields. |
| Optimizer Statistics | Settings that are used for statistics recollection. |