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Posted to hdfs-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2023/10/07 03:39:00 UTC

[jira] [Commented] (HDFS-17171) CONGESTION_RATIO should be configurable

    [ https://issues.apache.org/jira/browse/HDFS-17171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17772735#comment-17772735 ] 

ASF GitHub Bot commented on HDFS-17171:
---------------------------------------

hfutatzhanghb commented on code in PR #5996:
URL: https://github.com/apache/hadoop/pull/5996#discussion_r1349453662


##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java:
##########
@@ -614,6 +616,8 @@ public Map<String, Long> load(String key) {
         new DataTransferThrottler(100, ecReconstuctReadBandwidth) : null;
     this.ecReconstuctWriteThrottler = ecReconstuctWriteBandwidth > 0 ?
         new DataTransferThrottler(100, ecReconstuctWriteBandwidth) : null;
+    this.congestionRatio = conf.getDouble(DFSConfigKeys.DFS_PIPELINE_CONGESTION_RATIO,
+        DFSConfigKeys.DFS_PIPELINE_CONGESTION_RATIO_DEFAULT);

Review Comment:
   @ayushtkn Sir, thanks a lot for your suggestion here. Have fixed it.





> CONGESTION_RATIO should be configurable
> ---------------------------------------
>
>                 Key: HDFS-17171
>                 URL: https://issues.apache.org/jira/browse/HDFS-17171
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 3.4.0
>            Reporter: farmmamba
>            Assignee: farmmamba
>            Priority: Minor
>              Labels: pull-request-available
>
> Currently, The valuee of DataNode#CONGESTION_RATIO is 1.5 and it is not configurable.
> When the average load of a datanode in last one minute is higer than CONGESTION_RATIO * NUM_CORES, this datanode will be regard as CONGESTED. 
> In most real production envs,  the default value 1.5 seems not appropriate. So ,we should change this value to be configurable.



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