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https://issues.apache.org/jira/browse/HDDS-3481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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runzhiwang updated HDDS-3481:
-----------------------------
Description:
*What's the problem ?*
As the image shows, scm ask 31 datanodes to replicate container 2037 every 10
minutes.
!screenshot-1.png!
*What's the reason ?*
Replicate container cost a long time, so if it cannot finish in 10 minutes,
scm check the replicate num less than 3, than scm ask another datanode to
replicate the container. 19 of 31 datanodes replicate container from the same
source datanode, it will also cause big pressure on the source datanode and
replicate container become slower. Actually it cost 4 hours to finish the first
replicate.
was:
*What's the problem ?*
As the image shows, scm ask 31 datanodes to replicate container 2037 every 10
minutes.
!screenshot-1.png!
*What's the reason ?*
Replicate container cost a long time, so if it cannot finish in 10 minutes,
scm check the replicate num less than 3, than scm ask another datanode to
replicate the container. 19 of 31 datanodes replicate container from the same
source datanode, it will also cause big pressure on the source datanode and
replicate container become slower. Actually it cost 4 hours to finish the first
replicate.
> SCM ask 31 datanodes to replicate the same container
> ----------------------------------------------------
>
> Key: HDDS-3481
> URL: https://issues.apache.org/jira/browse/HDDS-3481
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Reporter: runzhiwang
> Assignee: runzhiwang
> Priority: Major
> Attachments: screenshot-1.png
>
>
> *What's the problem ?*
> As the image shows, scm ask 31 datanodes to replicate container 2037 every
> 10 minutes.
> !screenshot-1.png!
> *What's the reason ?*
> Replicate container cost a long time, so if it cannot finish in 10 minutes,
> scm check the replicate num less than 3, than scm ask another datanode to
> replicate the container. 19 of 31 datanodes replicate container from the
> same source datanode, it will also cause big pressure on the source datanode
> and replicate container become slower. Actually it cost 4 hours to finish the
> first replicate.
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