Information about big data and hadoop [closed] - hadoop

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I am a programmer and I am good in Database concept. I want to learn about big data and hadoop. But I don't have any past experience in these subjects. If anyone having good experience in big data and haddop please share how to start learning. If there are any institute or good websites please suggest. And if I need to do any course, please suggest that also. Thanks in advance.:-)

I find the tutorials from hortonworks a rather good starting point
http://hortonworks.com/tutorials/#tuts-developers
To deep dive a must read is Tom White's 'Hadoop: The Definitve Guide'.
'Hadoop in Practice' shows a lot of cookbook like examples.

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Best way to learn MapReduce [closed]

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I'm familiar and have worked with Hive, Pig, HBase. I have also gone through the Hadoop Definitive guide. I am familiar with core java, MapReduce architecture and MapReduce internals. However, I don't have any hands on experience in MapReduce and I need to learn MapReduce in terms of practical scenarios. Is there any book or link which you would recommend? I would appreciate any help or suggestions. Thanks!!
You can follow this book. This contains different mapreduce scenarios and code snippets.
MapReduce Patterns

Need some suggestions [closed]

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I want to learn ruby so that I can use it to build my own product.
Few challenges I am facing:
Searching on internet doesn't give proper details about ruby study materials
Need proper ruby course material
Need some good projects written in ruby
Best coding practices in ruby
I heard a lots of good things about http://railsforzombies.org, tho i never used it my self. Seems like interesting concept, worth to try.

Cloudera Certification for Hadoop developer [closed]

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I want to write Cloudera certification for Hadoop developer as people suggested that it is more complex compared to Hortonworks certification.
I was looking for materials for my preparation. All the materials in Cloudera site is very expensive atleast for me. Can you please let me know the books which I can use to clear this certification?
If you know the content well in the following books, then you should be decently prepared to attempt the exam:
Hadoop: The Definitive Guide
Hadoop Operations
I am also planning to write CCA Spark and Hadoop Developer Exam (CCA175) this year.
Kindly find my steps of preparation:
Haddop: The Definitive Guide
Pro Apache Hadoop
Hands on Practice by following youtube channel by itversity
Kindly add if you find more useful references.

How to become Oracle dba expert? [closed]

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I'm an aspiring Oracle DBA. I want to improve my dba skills asap.Is there any website or ebook
which will have step by step information to guide me through practicing DBA task at home.
Hoping for a favorable reponse!!!!
Yes, there is one website for this - the ultimate, the best, the one and only you'll ever need. And the eBook you are looking for is also there.
And definitely give this introduction manual a try.

Good Tutorials on Hadoop Cascading [closed]

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Could anybody point me some simple examples,links and books to learn Hadoop cascading.I couldnt find any good resources except Cascading site http://www.cascading.org/
http://www.cascading.org/documentation/ must be the best learning source for Cascading
My personal experience was: Cascading User Guide + Cascading for the Impatient
There's an O'Reilly book for Cascading: http://shop.oreilly.com/product/0636920028536.do
Also found an interesting 'Test driven learning' project:
BertrandDechoux/cascading.learn
other useful resources are available on: http://www.concurrentinc.com/resources/
If anything not clear, you can always ask questions on user group and get answers from there.

Resources