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https://issues.apache.org/jira/browse/HDFS-6846?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du updated HDFS-6846:
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Target Version/s: (was: 2.8.0)
> NetworkTopology#sortByDistance should give nodes higher priority, which cache
> the block.
> ----------------------------------------------------------------------------------------
>
> Key: HDFS-6846
> URL: https://issues.apache.org/jira/browse/HDFS-6846
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.6.0
> Reporter: Yi Liu
> Assignee: Yi Liu
>
> Currently there are 3 weights:
> * local
> * same rack
> * off rack
> But if some nodes cache the block, then it's faster if client read block from
> these nodes. So we should have some more weights as following:
> * local
> * cached & same rack
> * same rack
> * cached & off rack
> * off rack
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