File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Hadoop and the fly likes Beyond Hello World Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Databases » Hadoop
Bookmark "Beyond Hello World" Watch "Beyond Hello World" New topic

Beyond Hello World

Nishant Sonar

Joined: May 15, 2006
Posts: 2

Hello Chuck

I read hadoop books previously from O'Rielly Hadoop Definitive Guide, also followed some articles available from the Internet , but i could not go ahead of hello world program as I felt the difficulty in mapping the problem domain to writing map reduce programs. Also I felt it very difficult to map the mappers and reducers in the hadoop distributable with the problem domain.
Do you have any notion in your books towards mapping the problem in map reduce programs.

Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46337
I know it is a few days since you joined, but this seems to be just about your 1st post.

Welcome to JavaRanch
Chuck Lam

Joined: Aug 09, 2010
Posts: 12
One thing I kept in mind in writing the book was to have many realistic examples using MapReduce, so you can see various ways of applying it. MapReduce is a different way at structuring problems so it does take some time to get used to. Just as a event-based framework helps a lot in writing GUIs, the MapReduce framework helps in writing large data processing programs. The hurdle is getting used to a different view on this class of problems.
Hussein Baghdadi
clojure forum advocate

Joined: Nov 08, 2003
Posts: 3479

I'm wondering how a "Hello World" program is doable in Hadoop.
I agree. Here's the link:
subject: Beyond Hello World
It's not a secret anymore!