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https://issues.apache.org/jira/browse/HADOOP-2326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sanjay Radia updated HADOOP-2326:
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Attachment: dnBR_RandomBackoff2.txt
The attached patch:
- adds a random backoff for the block report sent after DN registration
(which occurs
at startup or when the NN looses contact with a DN).
- the default value of the backoff is 60sec (but for miniclusters is 0sec).
- this is configurable by a config file property:
dfs.blockreport.initialDelay (to be specified in seconds).
> Add a Random backoff for the initial block report sent to the Name node
> -----------------------------------------------------------------------
>
> Key: HADOOP-2326
> URL: https://issues.apache.org/jira/browse/HADOOP-2326
> Project: Hadoop
> Issue Type: Improvement
> Components: dfs
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Fix For: 0.16.0
>
> Attachments: dnBR_RandomBackoff2.txt
>
>
> Startup time can be improved if the initial block reports are spread randomly
> over small period of time.
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