For Hadoop Developer CCDH exam Should I start with installing Hadoop 2 or Hadoop 1 version?

[Garima Sharma]

I am planning to give exam for  Hadoop Developer CCDH certification. For this should I start with installing Hadoop 2 or Hadoop 1 version? This exam, study details, does not clarify whether they are expecting Hadoop1 or 2 from the learner?

I am enrolled in all your courses, so i started with installing Unbuntu (64 bit) then meanwhile  You uploaded the Hadoop 2 installation and without noticing the unbuntu bit version i installed Hadoop 2 on Unbuntu 14.04 (64 bit). Though when i ran jps command it shows all jobs are running but start command shows errors (which i searched over the internet is related to Unbuntu 64 bit version). Please advise.

[Nitesh Jain]

Hey Garima,

From learning point of view, Hadoop 1.2.1 would be perfectly fine. I have added the Setup hadoop 2 course because there were many who were struggling with Hadoop 2 installation and you can use it anytime to install Hadoop 2 on a 32 bit VM instance. It would be easy for you. 

There is no difference in programming when you code on Hadoop 1.2.1 or Hadoop 2.x.x. The same programs run on both the versions of Hadoop. It is just the way the program gets executed is a little different in Hadoop 2 and that all happens behind the scene and you would not be aware of it. That difference in framework is covered in details in section 7 of the course "Hadoop Certification Made Easy" .

So basically if you are with Hadoop 1.2.1, be with it thorough out the course and if you are starting out, you can try Hadoop 2 but that would need to be installed on 32 bit machine as it has one of its library:- libhadoop.so.1.0.0 which is not compliant with 64 bit architecture and hence creates the nuisance. Basically, there is a work around that as well to recompile that on 64 bit machine, but that is that much additional overhead. 

Hope this helps. Please do let me know if you may need my help!

Best,

Nitesh

http://hadoop-skills.com/

[Garima Sharma]

Thanks Nitesh. I will continue with Hadoop 1.2.1 version then .