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From "Alejandro Abdelnur (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2316) webhdfs: a complete FileSystem implementation for accessing HDFS over HTTP
Date Sat, 12 Nov 2011 00:52:51 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13148913#comment-13148913
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Alejandro Abdelnur commented on HDFS-2316:
------------------------------------------

Nicholas,

On #1, sorry don't agree, you are referring to HTTP/1.1 headers. We are talking about URLs
here, except for scheme and host everything else should case sensitive. Milind has also stated
his opinion on this in favor of case sensitive. Again, this is by spec; still the implementation
could be lenient.

On #2, if we go for types, then GETHOMEDIRECTORY uses { "Path" : "<PATH>" }, using similar
reasoning GETDELEGATIONTOKEN  should return { "Token" : "<TOKEN>" } (you are skipping
the field name of the structure type as the token seems to treated as an opaque value).

On #3, "symlink" is fine

On #4, then we should state in the parameter 'permission' that is a String with valid values
being a 3 digits octal number or '[0-7][0-7][0-7]'.

On #5, if the Token is to be decoded/parsed by a client in any way, it should be stated, independent
of Hadoop how to do the decoding.

Thanks.




                
> webhdfs: a complete FileSystem implementation for accessing HDFS over HTTP
> --------------------------------------------------------------------------
>
>                 Key: HDFS-2316
>                 URL: https://issues.apache.org/jira/browse/HDFS-2316
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: WebHdfsAPI20111020.pdf, WebHdfsAPI20111103.pdf, WebHdfsAPI20111111.pdf,
test-webhdfs, test-webhdfs-0.20s
>
>
> We current have hftp for accessing HDFS over HTTP.  However, hftp is a read-only FileSystem
and does not provide "write" accesses.
> In HDFS-2284, we propose to have webhdfs for providing a complete FileSystem implementation
for accessing HDFS over HTTP.  The is the umbrella JIRA for the tasks.

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