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https://issues.apache.org/jira/browse/HDFS-2316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13143558#comment-13143558
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Arpit Gupta commented on HDFS-2316:
-----------------------------------
{quote}
5. Regarding filestatus, delete, rename, mkdirs, setreplication payloads and
root element being a classname. JSON does not require a root element, a JSON
response can be an list of key/value pairs (JSON object). I'd prefer to keep it
like that. Specially for filestatus when doing a liststatus operation, else
they payload will increase significantly in size. Another issue with the name
of the class is that it should be an public class, not an implementation one
(currently is using 'HdfsFileStatus').
You mention that the root element class is added because of XML requiring a
root element. We are not spec-ing XML here. So I don't see this as a
requirement. And if somebody is doing JSON to XML they should account for that
in the transcoding.
{quote}
I dont think the size increases significantly by adding the root element.
Especially for the liststatus call it is the following if the root element is
there
{code}
{"HdfsFileStatuses":{"HdfsFileStatus":[]}}
{code}
or if the root is not there
{code}
{"HdfsFileStatus":[]}
{code}
I do no think this adds to much size to the response.
> 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
>
>
> 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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