there is nothing called update in hadoop 

its only either overwrite or append 

to write data into hadoop you wither use DFSClient or use hadoop cli to put data at the location you want 

On Thu, Dec 20, 2012 at 12:46 PM, Prabakaran Krishnan <> wrote:
 How to insert and update datin hadoop? Could you please explain me...

 Prabakara Krishnan

Nitin Pawar