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Posted to hdfs-issues@hadoop.apache.org by "Andrew Wang (JIRA)" <ji...@apache.org> on 2013/08/22 21:42:03 UTC

[jira] [Commented] (HDFS-5050) Add DataNode support for mlock and munlock

    [ https://issues.apache.org/jira/browse/HDFS-5050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13747812#comment-13747812 ] 

Andrew Wang commented on HDFS-5050:
-----------------------------------

I forgot to handle "uncache on delete/move" and the "only cache finalized replicas" checks. I'll work on adding those in, but I think it's still worth reviewing the v1 patch.
                
> Add DataNode support for mlock and munlock
> ------------------------------------------
>
>                 Key: HDFS-5050
>                 URL: https://issues.apache.org/jira/browse/HDFS-5050
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, namenode
>            Reporter: Colin Patrick McCabe
>            Assignee: Andrew Wang
>         Attachments: hdfs-5050-1.patch
>
>
> Add DataNode support for mlock and munlock.  The DataNodes should respond to RPCs telling them to mlock and munlock blocks.  Blocks should be uncached when the NameNode asks for them to be moved or deleted.  For now, we should cache only completed blocks.

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