Facebook has open sourced Presto, a “Distributed SQL Query Engine for Big Data.” It’s of course nothing new to see the Web heavyweights open source technologies they have developed to meet their own requirements - after all, Hadoop itself was born at Yahoo!, the Storm real-time framework comes to us courtesy of Twitter, and many more including eBay, LinkedIn, and Facebook have all made significant contributions to the big data cause.

However, in this case, the situation is different. The market is already crowded with alternative technologies for SQL-on-Hadoop:

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