Both , SAP HANA and Hadoop has become trending technology nowadays.
So, obviously there is a reason to be confused with which path should I choose.
Now, the answer of what you should choose always depends upon the experience already you possess.
If you are fresher , don't have industry experience, you can choose any of these two, both are well trending and has a great future, it really doesn't matter.
Whether it would be Hadoop or HANA , learning any of these two can boost your career, cause you are starting from a scratch .
Then the choice could be SAP HANA. Cause, all SAP applications and modules will be connected to SAP HANA database to store data. So, it always would provide an edge to your career.
A software developer experienced in distributed computing and clustering could learn Hadoop. A working professional or freelancer software developer worked in MapReduce concept OR a consultant who wants a business solution for his/her clients to process complex data known as Big Data could look for Hadoop. But, ofcourse a developer and consultant would need to know different aspects of Hadoop , one is technical and other one is overview to find solutions in business.
Experienced professionals in Java are mostly encouraged in Hadoop.
Ofcourse, there is no hard rule about it. But, yes if you have java experience , you could enjoy the journey of learning Hadoop and also have a great exposure to this big framework.
By the way, Hadoop is designed in Java.
Are you more passionate about DBMS concept and how does it work ? What could be next generation Databases ? All these are interesting for you ? Then, go for SAP HANA. The In-Memory database architecture would amaze you.
Now, "Which path should I choose ? " is mostly dependent upon your interest , if you are not sure what's your interest , then just jump for any of these two, both are promising.
Hadoop is the one which would a great solution for big data and whereas SAP HANA would serve the faster processing of data in DBMS structure with the help of In-Memory data storing capability.
Your professional background will be a helping agent , a catalyst in your learning curve.
We tried to pull up some scenarios to help you to decide which one you might choose.
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