DAS Glossary

**Table 1** Glossary
Term	Definition
Data Admin Service	Data Admin Service (DAS) enables you to manage DB instances on a web console, making your database management easy, efficient, and secure. It supports functions such as basic SQL operations, advanced database management, and intelligent SQL tuning, meeting your service requirements for daily R&D, database O&M, database management, and security.
Connection Address	An IP address, which is used for the DAS service to connect to the database.
Metadata Collection	DAS periodically collects DB instance metadata of databases, tables, and fields and stores the collected data in the DAS database. Advantages: Reduces queries on user databases and the impact on the user database performance. Improves the search performance for DB instances that contain a large number of tables and supports pagination queries. Notes: Only structural metadata is collected, which means that user's table data is not included. Currently, the following database types are supported: MySQL, PostgreSQL, GaussDB(for MySQL), GaussDB(for Cassandra), DDM, and DDS.

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