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Posted to hdfs-issues@hadoop.apache.org by "Ayush Saxena (Jira)" <ji...@apache.org> on 2021/02/14 18:25:00 UTC
[jira] [Commented] (HDFS-15793) Add command to DFSAdmin for
Balancer max concurrent threads
[ https://issues.apache.org/jira/browse/HDFS-15793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17284468#comment-17284468 ]
Ayush Saxena commented on HDFS-15793:
-------------------------------------
Thanx [~hadoop_yangyun] for the patch. I just had a cursory look, (sorry low on bandwidth)
Couple of things :
* Will decreasing the thread bother the already running ones?
* In the test can you check if actaully the threads increased/decreased apart from just asserting the output message, or atleast some thing more.
* Here will it be long or int?
{code:java}
+ RemoteMethod method = new RemoteMethod("setBalancerMaxThreads",
+ new Class<?>[] {Long.class}, maxThreads);
{code}
* Possible extending a test for Router too?
> Add command to DFSAdmin for Balancer max concurrent threads
> ------------------------------------------------------------
>
> Key: HDFS-15793
> URL: https://issues.apache.org/jira/browse/HDFS-15793
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: balancer & mover
> Reporter: Yang Yun
> Assignee: Yang Yun
> Priority: Minor
> Attachments: HDFS-15793.001.patch
>
>
> We have DFSAdmin command '-setBalancerBandwidth' to dynamically change the max number of bytes per second of network bandwidth to be used by a datanode during balancing. Also add '-setBalancerMaxThreads' to dynamically change the balancer maxThread number which may be used concurrently for moving blocks.
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