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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, 22 Oct 2011 20:36:33 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13133471#comment-13133471
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Alejandro Abdelnur commented on HDFS-2316:
------------------------------------------

Regarding case sensitivity, given that HDFS URIs are case sensitive, being case insensitive
in the querystring it would be confusing to users. Furthermore, being case insensitive in
part of the querystring it would be more confusing. I'd propose we are case sensitive and
all params and values we define are lowercase.

Regarding permissions, you are correct, Hoop uses output style which are absolute. While uncommon
I found the more intuitive.  I'll make sure Hoop handles octal as well.

Regarding file ranges, it is matter of convenience for users. I don't think it will cause
problems because there are not libraries that handle webhdfs/hoop URLs operations (and use
HTTP ranges), users will have to code the constructions of these URLs and then will use what
we provide. Again, I see a big value if ALL webhdfs/hoop operations are 100% selfcontained
in the URL.


                
> 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
>
>
> 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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