HDDS-14395. [Website v2] [Docs] [Administrator Guide] RocksDB in Apache Ozone

[Gargi-jais11]

What changes were proposed in this pull request?

Migrate the v1 doc "RocksDB in Apache Ozone" https://ozone.apache.org/docs/edge/concept/rocksdb.html to v2 doc: under Administrator Guide -> Configuration -> Performance

https://ozone-site-v2.staged.apache.org/docs/administrator-guide/configuration/performance/

What is the link to the Apache Jira?

https://issues.apache.org/jira/browse/HDDS-14395

How was this patch tested?

Check off which of the following tests were done on this change. If additional testing was done, please elaborate here as well.

• The CI checks on my fork are passing
• I verified the rendered content using a local preview
• I manually verified the steps provided in this change work as described

[Gargi-jais11]

@jojochuang I found out that there are some more configurations related to RocksDB in the codebase.
How about adding these as well in the doc for v2 doc under Tunings applicable to RocksDB?
General Settings:

• ozone.metastore.rocksdb.statistics: The statistics level of the RocksDB store. If set to any value from org.rocksdb.StatsLevel (e.g., ALL or EXCEPT_DETAILED_TIMERS), RocksDB statistics will be exposed over JMX. Set to OFF to disable statistics collection. Note: collecting statistics can have a 5–10% performance penalty. Default: OFF.

Ozone Manager (OM) Specific Settings

• ozone.om.snapshot.rocksdb.metrics.enabled: Enable or disable detailed RocksDB metrics for snapshot databases. Default: false.
• ozone.om.snapshot.db.max.open.files: Maximum number of open files for each snapshot RocksDB instance. Default: 100.
• ozone.om.snapshot.cache.max.size: Maximum size of the snapshot cache (soft limit), controlling how many snapshot RocksDB instances are kept open. Default: 10.

DataNode-Specific Settings:

• hdds.datanode.db.config.path: Path to an INI configuration file for advanced RocksDB tuning on datanodes. Default: empty (not configured).
• hdds.datanode.container.schema.v3.enabled: Enable container schema v3 (one RocksDB per disk). Default: true.
• hdds.datanode.container.schema.v3.key.separator: The separator between Container ID and container meta key name in schema v3. Default: "|".

[jojochuang]

Thanks for double check. Yeah those look good.

The OM snapshot related configuration properties are mention in the Ozone Snapshot section. No need to duplicate here.
The https://ozone-site-v2.staged.apache.org/docs/administrator-guide/operations/snapshots/configuration-properties

[Gargi-jais11]

Thanks for double check. Yeah those look good.

The OM snapshot related configuration properties are mention in the Ozone Snapshot section. No need to duplicate here. The https://ozone-site-v2.staged.apache.org/docs/administrator-guide/operations/snapshots/configuration-properties

So I can add these expect OM ones:
General Settings:

ozone.metastore.rocksdb.statistics: The statistics level of the RocksDB store. If set to any value from org.rocksdb.StatsLevel (e.g., ALL or EXCEPT_DETAILED_TIMERS), RocksDB statistics will be exposed over JMX. Set to OFF to disable statistics collection. Note: collecting statistics can have a 5–10% performance penalty. Default: OFF.

DataNode-Specific Settings:

hdds.datanode.db.config.path: Path to an INI configuration file for advanced RocksDB tuning on datanodes. Default: empty (not configured).
hdds.datanode.container.schema.v3.enabled: Enable container schema v3 (one RocksDB per disk). Default: true.
hdds.datanode.container.schema.v3.key.separator: The separator between Container ID and container meta key name in schema v3. Default: "|".

[jojochuang]

Yes those are good

[Gargi-jais11]

Yes those are good

done

[jojochuang]

Merged. Thanks @Gargi-jais11 !!