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From "Tsz Wo (Nicholas), SZE (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2316) webhdfs: a complete FileSystem implementation for accessing HDFS over HTTP
Date Fri, 28 Oct 2011 20:33:32 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13138726#comment-13138726

Tsz Wo (Nicholas), SZE commented on HDFS-2316:

> 1. versioning

Added v1 to the prefix, i.e. the url is http://nn:port/webhdfs/v1/path/to/file?op=...

> 2. ranges

Since it is optional in the http spec, let's use offset and length query parameters.

> 3. params case sensitivity

Won't case insensitive parameter names be more user friendly?

> 4. permissions format

Let's use octal.  Handling sticky bit with ls output style is tricky.

> 5. protocol scheme to use

Do you mean the FileSystem scheme?  Webhdfs is using "webhdfs://".  I think "http://" is not
suitable to be overloaded as a FileSystem scheme.

> 6. how to get the create/append handle ...

Commented on HDFS-2178.

Sorry that I am still updating the doc.
> 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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