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From "Eli Collins (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 19:17:40 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163753#comment-13163753
] 

Eli Collins commented on HDFS-2178:
-----------------------------------

bq. Hoop actually depends on the HDFS JAR. HDFS JAR has to go into its WAR.

That would be true for other file system implementations as well right? IMO either Hoop is
cross hadoop file system and we test/support that use case and should put it in common to
prevent it from becoming hdfs specific, or it's hdfs specific in which case it should live
in HDFS and proxy to webhdfs.

Wrt test coverage if a change is made to Hoop in common that breaks eg HDFS or WebHDFS backends
then those jenkins jobs fail as soon as they pull in the new artifact. This is how it works
today for other cross-component features.
                
> 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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