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From "Alejandro Abdelnur (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2178) Contributing Hoop to HDFS, replacement for HDFS proxy with read/write capabilities
Date Tue, 06 Dec 2011 19:55:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163779#comment-13163779
] 

Alejandro Abdelnur commented on HDFS-2178:
------------------------------------------

Hoop primary use case is to proxy to HDFS. The DistributedFileSystem client implementation
different from other filesystem implementations, it is not in hadoop-common but in hadoop-hdfs
(the same goes for WebHdfsFileSystem client implementation).  Should these implementations
be moved to hadoop-common?

Regarding Hoop being a proxy webhdfs, you could use a HTTP proxy for that. But this means
you'd have to configure you (whatever) client to use the HTTP proxy. And all cluster nodes
names would be exposed. Or you could make a specialized proxy, this would be a reverse proxy.
This would add another network hop and it would not work with other filesystems implementations.


                
> Contributing Hoop to HDFS, replacement for HDFS proxy with read/write capabilities
> ----------------------------------------------------------------------------------
>
>                 Key: HDFS-2178
>                 URL: https://issues.apache.org/jira/browse/HDFS-2178
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 0.23.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 0.24.0, 0.23.1
>
>         Attachments: HDFS-2178.patch, HDFS-2178.patch, HDFS-2178.patch, HDFS-2178.patch,
HDFS-2178.patch, HDFS-2178.patch, HDFS-2178.patch, HDFSoverHTTP-API.html, HdfsHttpAPI.pdf
>
>
> We'd like to contribute Hoop to Hadoop HDFS as a replacement (an improvement) for HDFS
Proxy.
> Hoop provides access to all Hadoop Distributed File System (HDFS) operations (read and
write) over HTTP/S.
> The Hoop server component is a REST HTTP gateway to HDFS supporting all file system operations.
It can be accessed using standard HTTP tools (i.e. curl and wget), HTTP libraries from different
programing languages (i.e. Perl, Java Script) as well as using the Hoop client. The Hoop server
component is a standard Java web-application and it has been implemented using Jersey (JAX-RS).
> The Hoop client component is an implementation of Hadoop FileSystem client that allows
using the familiar Hadoop filesystem API to access HDFS data through a Hoop server.
>   Repo: https://github.com/cloudera/hoop
>   Docs: http://cloudera.github.com/hoop
>   Blog: http://www.cloudera.com/blog/2011/07/hoop-hadoop-hdfs-over-http/
> Hoop is a Maven based project that depends on Hadoop HDFS and Alfredo (for Kerberos HTTP
SPNEGO authentication). 
> To make the integration easy, HDFS Mavenization (HDFS-2096) would have to be done first,
as well as the Alfredo contribution (HADOOP-7119).

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