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Difference between HBase and Hadoop/HDFS

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Explorer

Hi,

This is kind of naive question but I am new to NoSQL paradigm and don't know much about it. So if somebody can help me clearly understand the difference between the HBase and Hadoop or if give some pointers which might help me understand the difference.

Till now, I did some research and acc. to my understanding Hadoop provides a framework to work with a raw chunk of data(files) in HDFS and HBase is database engine above Hadoop, which basically works with structured data instead of the raw data chunk. HBase provides a logical layer of HDFS just as SQL does. Is it correct?

Pls, feel free to correct me.

Thanks.

hari

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Generally to collect the data from various sources we use big data. all the data can be in a distinct form. so we cannot perform processes the effectively. using big data Hadoop  there are various tools available so we can perform the operations effectively