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https://issues.apache.org/jira/browse/HDFS-5053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13738748#comment-13738748
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Colin Patrick McCabe commented on HDFS-5053:
--------------------------------------------
You are correct-- mlock is an implementation detail, not relevant to the
NameNode. I removed the word "mlock" from the summary and description
> NameNode should invoke DataNode APIs to coordinate caching
> ----------------------------------------------------------
>
> Key: HDFS-5053
> URL: https://issues.apache.org/jira/browse/HDFS-5053
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Reporter: Colin Patrick McCabe
>
> The NameNode should invoke the DataNode APIs to coordinate caching.
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