Open Source NoSQL Databases

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NoSQL has started as an alternative to the relational databases. Scalability has become the biggest motivation factor behind the NoSQL. Usually releational databases do not support well to the kind of horizontal scalbility that's required for large-scale social networks or cloud applications. NoSQL is a movement that aims to re-examine the way we structure data and draw attention to innovation in hopes to finding the solution to the next generation's data persistance problems.

Reference and more detail please visit : NoSQL

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