Actually, if you care about being binary compatible b/w hadoop-1 and hadoop-2, 
stay with "old" mapred API.

On Apr 25, 2013, at 10:04 AM, Sandy Ryza wrote:

> Hi Kevin,
> 
> JobClient/JobConf is the "old" mapred API and Job/Configuration is the 
> improved "new" API, so in general the latter is preferred.
> 
> -Sandy
> 
> 
> On Thu, Apr 25, 2013 at 5:27 AM, Kevin Burton <rkevinbur...@charter.net> 
> wrote:
> I notice that in some beginning texts on starting a Hadoop MapReduce job 
> sometimes JobClient/JobConf is used and sometimes Job/Configuration is used. 
> I have yet to see anyone comment on the features/benefits of either set of 
> methods. Could someone comment on their preferred method for starting a 
> MapReduce job from a Java program?
> 
>  
> 
> Thank you.
> 
> 

--
Arun C. Murthy
Hortonworks Inc.
http://hortonworks.com/


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