NoSQL: Cassandra & Hector

NoSQL are a class of non-relational data stores that break with the concept of a relational database. These data stores are usually identified by not requiring a fixed table schemas, they usually do not have a join operation between sets and have the ability to scale horizontally. The first major implementations were Google's BigTable and Amazon's Dynamo. Today, however, there are over 25 different databases that fall into this category including...

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