KnowForgeMetastores
师成· 更新于 2026-09-29· 阅读 4 分钟· 0 次阅读登录后可跨设备保存划线和私人笔记登录
Metastores
A metastore is the persistence backend that stores and manages catalog metadata. This includes:
- Polaris entities: catalogs, namespaces, tables, views, principals, roles, etc.
- Polaris RBAC data: authorization and access control information (when using the built-in authorizer).
- Polaris policies: policy configurations for data governance and security.
Polaris supports three metastore implementations and persistence backends:
| Backend | Type | Support Level | Description |
|---|---|---|---|
| In-Memory | in-memory | Test only | Data is stored in memory and lost when pods restart. Suitable for development and testing only. |
| PostgreSQL (JDBC) | relational-jdbc | Ready to use | Data is stored in a PostgreSQL database using JDBC. Recommended for production. |
| MongoDB (NoSQL) | nosql | Experimental | Data is stored in a MongoDB database. Currently in beta. |
⚠️ Warning
The default in-memory backend is not suitable for production. Data will be lost when the server restarts!
This section explains how to configure and use Polaris with the following backends:
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