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https://issues.apache.org/jira/browse/HDFS-2316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13144367#comment-13144367
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Tsz Wo (Nicholas), SZE commented on HDFS-2316:
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1. Agree, symlink could be optional. BTW, the "isDir" and "isSymlink" are
replaced with "type", which is an enum {FILE, DIRECTORY, SYMLINK}
2. Sure. Let's change it in a separated JIRA then.
3. Path is a parameter value, therefore case sensitive.
I think case sensitive causes more confusion:
Q: Why this is not working? http://nn:port/webhdfs/v1/path?Op=GETFILECHECKSUM
A: You must use lower case: "Op" should be "op"
Q: Why this is not working?
http://nn:port/webhdfs/v1/path?op=GETFILECHECKSUM&does=nicholas
A: It is a typo: "does" should be "doas".
Q: But "doas" looks more like a typo than "does". I wish I can use "doAs"
How about op values and boolean values? Do you also think that they should be
case sensitive?
4. "name" should like file/directory names. "localName" is an empty string if
the full path is given. How about calling it "pathSuffix"?
5. As Arpit mentioned, the payload for liststatus won't be increased
significantly. We only needs two more words per request (instead of one more
word per status.)
Is Hoop going to support file system other than HDFS?
It is common to convert JSON to/from XML. We should make the convertion
trivial.
6. Webhdfs and hoop should not share the same scheme since they require
different implementatons. Webhdfs should use "webhdfs://". For hoop, I
suggest not using "http://"; as a file system scheme.
> 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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