Look at 

http://wiki.apache.org/hadoop/HowToContribute

It gives step by step instructions.

--Bobby

On 3/18/13 6:43 AM, "Mustaqeem" <3m.mustaq...@gmail.com> wrote:

>I am also working in same direction.
>As I am new, First of all, I want to know that what have you done to
>enhance the 
>hadoop performance in heterogeneous environment.
>I have an strategy for that.
>What I really need is how to modify the Hadoop source code?? and how to
>compile 
>the source code.
>As I am very new to this field, I want step by step instructions.
>
>Please, help me. It is for my thesis.
>Hope you will reply as soon as possible.
>

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