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https://issues.apache.org/jira/browse/HDFS-12483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lei (Eddy) Xu resolved HDFS-12483.
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Resolution: Duplicate
> Provide a configuration to adjust the weight of EC recovery tasks to adjust
> the speed of recovery
> -------------------------------------------------------------------------------------------------
>
> Key: HDFS-12483
> URL: https://issues.apache.org/jira/browse/HDFS-12483
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: erasure-coding
> Affects Versions: 3.0.0-alpha4
> Reporter: Lei (Eddy) Xu
> Assignee: Lei (Eddy) Xu
> Priority: Minor
>
> The relative speed of EC recovery comparing to 3x replica recovery is a
> function of (EC codec, number of sources, NIC speed, and CPU speed, and etc).
> Currently the EC recovery has a fixed {{xmitsInProgress}} of {{max(# of
> sources, # of targets)}} comparing to {{1}} for 3x replica recovery, and NN
> uses {{xmitsInProgress}} to decide how much recovery tasks to schedule to the
> DataNode this we can add a coefficient for user to tune the weight of EC
> recovery tasks.
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