[jira] [Commented] (HDFS-6843) Create FileStatus isEncrypted() method

["Steve Loughran (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-6843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14121976#comment-14121976 ] 

Steve Loughran commented on HDFS-6843:
--------------------------------------

Given that HADOOP-11026 is related purely to this, I'd them to be pulled in. 

# without this, the semantics of "isEncrypted" aren't really being defined, are they? We're adding a new field, but not tying it up to the rest of the system
# We need to specify the transientness of this. If a directory has isEncrypted(), is it true that for all subdirectories this property holds? And all files in the directory?
# once we have that specification, we can derive the tests to verify that the logic being implemented here matches that specification.



> Create FileStatus isEncrypted() method
> --------------------------------------
>
>                 Key: HDFS-6843
>                 URL: https://issues.apache.org/jira/browse/HDFS-6843
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode, security
>    Affects Versions: 3.0.0
>            Reporter: Charles Lamb
>            Assignee: Charles Lamb
>         Attachments: HDFS-6843.001.patch, HDFS-6843.002.patch, HDFS-6843.003.patch, HDFS-6843.004.patch
>
>
> FileStatus should have a 'boolean isEncrypted()' method. (it was in the context of discussing with AndreW about FileStatus being a Writable).
> Having this method would allow MR JobSubmitter do the following:
> -----
> BOOLEAN intermediateEncryption = false
> IF jobconf.contains("mr.intermidate.encryption") THEN
>   intermediateEncryption = jobConf.getBoolean("mr.intermidate.encryption")
> ELSE
>   IF (I/O)Format INSTANCEOF File(I/O)Format THEN
>     intermediateEncryption = ANY File(I/O)Format HAS a Path with status isEncrypted()==TRUE
>   FI
>   jobConf.setBoolean("mr.intermidate.encryption", intermediateEncryption)
> FI



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