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HADOOP-19056. Highlight RBF features and improvements targeting version 3.4. (#6512) Contributed by Takanobu Asanuma.

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Signed-off-by: Shilun Fan <slfan1989@apache.org>
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Takanobu Asanuma 2024-01-31 14:30:35 +09:00 committed by GitHub
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@ -89,8 +89,20 @@ Important features and improvements are as follows:
[HDFS-15294](https://issues.apache.org/jira/browse/HDFS-15294) HDFS Federation balance tool introduces one tool to balance data across different namespace.
[HDFS-13522](https://issues.apache.org/jira/browse/HDFS-13522), [HDFS-16767](https://issues.apache.org/jira/browse/HDFS-16767) Support observer node from Router-Based Federation.
**Improvement**
[HADOOP-13144](https://issues.apache.org/jira/browse/HADOOP-13144), [HDFS-13274](https://issues.apache.org/jira/browse/HDFS-13274), [HDFS-15757](https://issues.apache.org/jira/browse/HDFS-15757)
These tickets have enhanced IPC throughput between Router and NameNode via multiple connections per user, and optimized connection management.
[HDFS-14090](https://issues.apache.org/jira/browse/HDFS-14090) RBF: Improved isolation for downstream name nodes. {Static}
Router supports assignment of the dedicated number of RPC handlers to achieve isolation for all downstream nameservices
it is configured to proxy. Since large or busy clusters may have relatively higher RPC traffic to the namenode compared to other clusters namenodes,
this feature if enabled allows admins to configure higher number of RPC handlers for busy clusters.
[HDFS-17128](https://issues.apache.org/jira/browse/HDFS-17128) RBF: SQLDelegationTokenSecretManager should use version of tokens updated by other routers.
The SQLDelegationTokenSecretManager enhances performance by maintaining processed tokens in memory. However, there is