By simply looking at structured and unstructured data, Data Lakes enable companies to understand correlations between existing and new external data - such as social media - in ways traditional Business Intelligence tools cannot. For this you need to find out the most efficient way to store and access structured or unstructured petabyte-sized data across your entire infrastructure. In this meetup we’ll give answers on the next questions: 1. Why would someone use a Data Lake? 2. Is it hard to build a Data Lake? 3. What are the main features that a Data Lake should bring in? 4. What’s the role of the microservices in the big data world?