Hadoop. Once largely unknown, hit the scene in part due to the explosion of unstructured data. It’s common for uses like web analytics, which requires more flexibility. And shortly after the open-source software was accepted due to necessity, it has been adopted for structured use-cases, as well.
According to a new report from Sqream DB, in these cases, SQL query engines have been bolted on Hadoop, and convert relational operations into map/reduce style operations.