Common Concepts
- Filter
Filters provide powerful features to help users improve the table data processing efficiency of HBase. Users can use the filters predefined in HBase and customized filters.
- Coprocessor
Coprocessors enable users to perform region-level operations and provide functions similar to those of triggers in relational database management systems (RDBMSs).
- keytab file
The keytab file is a key file that stores user information. In security mode, applications use the key file for API authentication on HBase.
- Client
Users can access the server from the client through the Java API, HBase Shell or WebUI to read and write HBase tables. The HBase client in this document indicates the HBase client installation package, see External Interfaces.
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