Hi,
How can I give filename as key to mapper ?
I want to know the occurence of word in set of docs, so I want to keep key
as filename. Is it possible to give input key as filename in map function ?
Thanks,
Praveenesh
You can retrieve the filename in the new API as described here:
http://search-hadoop.com/m/ZOmmJ1PZJqt1/map+input+filenamesubj=Retrieving+Filename
In the old API, its available in the configuration instance of the
mapper as key map.input.file. See the table below this section
To add to that if you really want the file name to be the key instead of just
calling a different API in your map to get it you will probably need to write
your own input format to do it. It should be fairly simple and you can base it
off of an existing input format to do it.
--Bobby
On
I am new to this hadoop API. Can anyone give me some tutorial or code snipet
on how to write your own input format to do these kind of things.
Thanks.
On Fri, Jul 15, 2011 at 8:07 PM, Robert Evans ev...@yahoo-inc.com wrote:
To add to that if you really want the file name to be the key instead
: The Definitive
Guide.
Matt
-Original Message-
From: praveenesh kumar [mailto:praveen...@gmail.com]
Sent: Friday, July 15, 2011 9:42 AM
To: common-user@hadoop.apache.org
Subject: Re: Giving filename as key to mapper ?
I am new to this hadoop API. Can anyone give me some tutorial or code
