Oracle IBM EMC Semantics3 Zillabyte Citus Data Mixpanel Segment.io Chartio Leftronic GinzaMetrics Consider the companies selling big data products: Oracle, IBM, Microsoft, EMC.  Generally speaking, big data refers to extremely large volumes of unstructured data.  Such data is also called “dark data“, because it results in missed opportunities when not put to immediate use.  Problem is not [...]