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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-341) Enhance distcp to handle *http* as a 'source protocol'.
Date Mon, 03 Jul 2006 11:50:29 GMT
Enhance distcp to handle *http* as a 'source protocol'.
-------------------------------------------------------

         Key: HADOOP-341
         URL: http://issues.apache.org/jira/browse/HADOOP-341
     Project: Hadoop
        Type: Improvement

  Components: util  
    Reporter: Arun C Murthy


Requirements:

  Presently distcp recursively copies a directory from one dfs to another i.e. both source
and destination of of the *dfs* protocol.
  Enhance it to handle *http* as the source protocol i.e. support copying files from arbitrary
http-based sources into the dfs.

Design:
  
  Follow distcp's current design: one map task per file which needs to be copied.

  Caveat: distcp handles *recursive* copying by listing sub-directories; this is not as feasible
with a http-based source since things like 'fancy-indexing' might not be enabled on the web-server
(for all sub-locations recursively too), and even if it is enabled it will mean tedious parsing
of the html served to glean the sub-directories etc. Hence the idea is to support an input
file (via a -f option) which contains a list of the http-based urls which represent multiple
source files.


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