I thought "big data" meant huge volumes that can't fit in a traditional db (despite that those can scale to several terabytes), or sometimes data collected from

I thought "big data" meant huge volumes that can't fit in a traditional db (despite that those can scale to several terabytes), or sometimes data collected from multiple unrelated detailed sources (such as correlating local weather, the stock market, and recent cricket scores with how much time your employees spend on HN). This doesn't sound like either.