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From "Milind Bhandarkar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2284) RW Http access to HDFS
Date Mon, 29 Aug 2011 18:52:37 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13093080#comment-13093080
] 

Milind Bhandarkar commented on HDFS-2284:
-----------------------------------------

@Alejandro, as I have said before, having Hoop as http-based HDFS proxy, layered on top of
the FileSystem API, and implementing Filesystem APIs as a wrapper on top of hoop makes complete
sense to me (indeed, that was what hdfs proxy v3, abandoned last year (?), was supposed to
do.) What I am concerned about, is: *two different implementations of the same APIs inside
the hdfs daemons*. According to Sanjay, the reasoning for this second implementation is lack
of wire compatibility in native RPC. My assumption, based on the recent activity in hdfs-dev,
is that wire-compatibility in HDFS native RPC is coming soon (i.e. within next year). Therefore,
I am seeking answers about the *real* use case of embedding hoop inside NN/DN.

Keeping Hoop as a layer on top of FS APIs enables a hadoop-client-free data import-export
mechanism across *all* the file systems that have FS binding for Hadoop.

> RW Http access to HDFS
> ----------------------
>
>                 Key: HDFS-2284
>                 URL: https://issues.apache.org/jira/browse/HDFS-2284
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Sanjay Radia
>            Assignee: Tsz Wo (Nicholas), SZE
>
> HFTP allows on read access to HDFS via HTTP. Add RW HTTP access to HDFS)

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