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Hortonwork and cloudera companies are merged now so, which certification would be better to take? Please share your thought on this one.
In my opinion it depends on your present case and career goals. For example, if you are (looking for) working as an HDP Administrator, no Cloudera certification would be helpful.
Hortonworks certification exams are being re-branded as 'Cloudera HDP certifications' since there is a definite plan to maintain HDP production for a few years.
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I want to write a very simple (but fully functional) Apache Zookeeper like service in go? Where do I start ?
Hm, i think you should understand what zookeeper do first, eg. configuration information, naming, providing distributed synchronization , also need to know paxos, and so on.
please reference to etcd on github.
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Which one should start first..in sequential order .. when we have Oozie,HDFS,Hive Zookeeper and other tools in the Hadoop ecosystem?
It an administrative question posed by my superiors .
There are multiple possibilities based on the deployment scenarios like for example if you have highly available Hadoop (NameNode high-availability, ResourceManager/JobTracker high-availability) or have HBase in the cluster then the order would be something like this:
Zookeeper
HDFS
HBase (if used)
Yarn/MapReduce
Other Ecosystem tools (hive, pig, sqoop, oozie)
It doens't matter the start order of the eco-system tools.
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Can one make any earning by getting involved in Springsource projects(by contributing code, submitting pull requests, testing features etc.)
You can if you are a VMWare employee.
You probably can (indirectly) if you are a normal guy. Being an opensource contributor is something good employers are looking for and may help you get a better job / salary.
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I am trying to devise an ideal work flow which involves client, PM , Configuration manager, team leader, developer , tester and finally the repository itself.
Who would control what,how will the information flow and what role should the PM have when a change is requested.
A very suitable starting point would be the Wikipedia entry on this subject:
http://en.wikipedia.org/wiki/Change_management_(engineering)
It does a good job of showing the general process flow and roles & responsibilities. You may want to tweak it to your organization.
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In my application i have to create report.I don't know which opensource reporting tool is best either jassper report or pentaho report.If anyone has idea about this please share your view. And In what are the aspect jasperreport is differ with pentaho.
I would highly recommend the myDBR reporting tool. myDBR allows you to create your reports within minutes and can easily be integrated to your existing web-application.