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Date: Tue, 26 Sep 2017 04:35:00 +0000 (UTC)
From: "Mukul Kumar Singh (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-12545) Autotune NameNode RPC handler
 threads according to number of datanodes in cluster
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archived-at: Tue, 26 Sep 2017 04:35:05 -0000


    [ https://issues.apache.org/jira/browse/HDFS-12545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16180230#comment-16180230 ] 

Mukul Kumar Singh commented on HDFS-12545:
------------------------------------------

Thanks for raising this issue [~ajayydv], In case namenode service rpc is enabled would this fix try to tune service-rpc prt as well ?

> Autotune NameNode RPC handler threads according to number of datanodes in cluster
> ---------------------------------------------------------------------------------
>
>                 Key: HDFS-12545
>                 URL: https://issues.apache.org/jira/browse/HDFS-12545
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Ajay Kumar
>            Assignee: Ajay Kumar
>
> Autotune NameNode RPC handler threads according to number of datanodes in cluster. Currently rpc handler are controlled by {{dfs.namenode.handler.count}} on cluster start. Jira is to discuss best way to auto tune it according to no of datanodes. Updating this to {{max(dfs.namenode.handler.count, min(200,20 * log2(no of datanodes)))}} on NameNode start is one possible way. 


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