On Oct 12, 2007, at 5:51 AM, Shailendra Mudgal wrote:

I am adding two input dir in a job. Both the input dirs have same <Key.class, Value.class>. Inside the map method i want to know that which pair<key, value> has come from which input dir. How can i do this ? Any help will be
appreciated..

*sigh* We've _almost_ had that feature for a long time now, see HADOOP-372.

The work around is to use the information on:
http://wiki.apache.org/lucene-hadoop/TaskExecutionEnvironment
and get the "map.input.file" from the map's JobConf and match against the prefix.

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