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HDDS-14433. [Docs] Advanced Ratis configuration. #9637

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HDDS-14433. [Website v2] [Docs] [Core Concepts] Ratis configurations.
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15 changes: 15 additions & 0 deletions hadoop-hdds/docs/content/feature/multi-raft-support.md
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Expand Up @@ -105,6 +105,21 @@ Ratis handles concurrent logs per node.
The Ratis pipelines will be distributed accordingly.
- Be cautious with very high pipeline counts due to memory/CPU overhead.

## Advanced Ratis Configuration

Any Ratis configuration properties can be set by prepending a corresponding prefix.
The following table shows the prefixes in each Ozone component.

| Ozone Components | Configuration Prefixes | Examples: To set `raft.server.write.byte-limit` |
|---------------------------------|------------------------|-------------------------------------------------|
| Ozone Manager (OM) | `ozone.om.ha.` | Use `ozone.om.ha.raft.server.write.byte-limit` |
| Storage Container Manager (SCM) | `ozone.scm.ha.` | Use `ozone.scm.ha.raft.server.write.byte-limit` |
| Datanode | `hdds.ratis.` | Use `hdds.ratis.raft.server.write.byte-limit` |
| Ozone Client | `hdds.ratis.` | Use `hdds.ratis.raft.server.write.byte-limit` |

See also [Apache Ratis configuration
documentation](https://github.com/apache/ratis/blob/ratis-3.2.1/ratis-docs/src/site/markdown/configurations.md).

## Limitations
- Global configuration: cannot set per-node limits
- Requires restart after changing storage dirs
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