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https://issues.apache.org/jira/browse/HDFS-16678?focusedWorklogId=793959&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-793959
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ASF GitHub Bot logged work on HDFS-16678:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 21/Jul/22 22:37
Start Date: 21/Jul/22 22:37
Worklog Time Spent: 10m
Work Description: ZanderXu commented on code in PR #4606:
URL: https://github.com/apache/hadoop/pull/4606#discussion_r927153919
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RBFConfigKeys.java:
##########
@@ -315,6 +315,9 @@ public class RBFConfigKeys extends
CommonConfigurationKeysPublic {
FEDERATION_ROUTER_PREFIX + "dn-report.cache-expire";
public static final long DN_REPORT_CACHE_EXPIRE_MS_DEFAULT =
TimeUnit.SECONDS.toMillis(10);
+ public static final String DFS_ROUTER_ENABLE_GET_DN_USAGE_KEY =
+ FEDERATION_ROUTER_PREFIX + "enable.get.dn.usage";
+ public static final boolean DFS_ROUTER_ENABLE_GET_DN_USAGE_DEFAULT = true;
Review Comment:
Copy, I will do it.
Issue Time Tracking
-------------------
Worklog Id: (was: 793959)
Time Spent: 40m (was: 0.5h)
> RBF supports disable getNodeUsage() in RBFMetrics
> -------------------------------------------------
>
> Key: HDFS-16678
> URL: https://issues.apache.org/jira/browse/HDFS-16678
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: ZanderXu
> Assignee: ZanderXu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> In our prod environment, we try to collect RBF metrics every 15s through
> jmx_exporter. And we found that collection task often failed.
> After tracing and found that the collection task is blocked at getNodeUsage()
> in RBFMetrics, because it will collection all datanode's usage from
> downstream nameservices. This is a very expensive and almost useless
> operation. Because in most scenarios, each NameSerivce contains almost the
> same DNs. We can get the data usage's from any one nameservices, not from RBF.
> So I feel that RBF should supports disable getNodeUsage() in RBFMetrics.
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