There is mapper called IdentityMapper (look of IdentityMapper.java), which basically reads input and outputs without doing anything. May be you can run your mapper with no reducers and store intermediate output and then run your 2 hadoop programs with Identity mapper and different set of reducers. Thanks, Lohit
----- Original Message ---- From: Elia Mazzawi <[EMAIL PROTECTED]> To: [email protected] Sent: Friday, November 7, 2008 12:35:44 PM Subject: reduce more than one way Hello, I'm writing hadoop programs in Java, I have 2 hadooop map/reduce programs that have the same map, but a different reduce methods. can i run them in a way so that the map only happens once? maybe store the intermediate result or something?
