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From Harsh J <ha...@cloudera.com>
Subject Re: Giving filename as key to mapper ?
Date Fri, 15 Jul 2011 12:40:19 GMT
You can retrieve the filename in the new API as described here:

http://search-hadoop.com/m/ZOmmJ1PZJqt1/map+input+filename&subj=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
http://hadoop.apache.org/common/docs/r0.20.2/mapred_tutorial.html#Task+JVM+Reuse
for more such goodies.

On Fri, Jul 15, 2011 at 5:44 PM, praveenesh kumar <praveenesh@gmail.com> wrote:
> 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
>



-- 
Harsh J

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