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https://issues.apache.org/jira/browse/HDFS-16767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17603226#comment-17603226
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ASF GitHub Bot commented on HDFS-16767:
---------------------------------------
simbadzina commented on code in PR #4127:
URL: https://github.com/apache/hadoop/pull/4127#discussion_r968801237
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/metrics/FederationRPCMetrics.java:
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@@ -49,7 +50,10 @@ public class FederationRPCMetrics implements
FederationRPCMBean {
private MutableRate proxy;
@Metric("Number of operations the Router proxied to a Namenode")
private MutableCounterLong proxyOp;
-
+ @Metric("Number of operations the Router proxied to a Active Namenode")
Review Comment:
An administrator may want to directly observe the number of operations going
to the active, without having to subtract observerProxyOp from proxyOp. This
also makes tests simpler.
> RBF: Support observer node from Router-Based Federation
> --------------------------------------------------------
>
> Key: HDFS-16767
> URL: https://issues.apache.org/jira/browse/HDFS-16767
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Simbarashe Dzinamarira
> Assignee: Simbarashe Dzinamarira
> Priority: Major
>
> Enable routers to direct read calls to observer namenodes.
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