Big Data Tech and Analytics --- Introduction

1. Characteristics of Big Data: 4V

• Volume: From terabytes to exabyte to zetabytes of existing data to process
• Velocity: Batch data, real-time data, streaming data, milliseconds to seconds to respond
• Variety: Structured, semi-structured, unstructured, text, pictures, multimedia
• Veracity: Uncertainty due to data inconsistency & incompleteness, ambiguities, deception, model approximation 

2. Bonferroni’s principle:

if you look in more places for interesting patterns than your amount of data will support, you are bound to find crap.