Traditional business intelligence (BI) systems provide various levels and types of analyses of structured data, but they are not designed to handle unstructured data. For these systems, big data brings big problems because the data that flows in may be either structured or unstructured. That hugely limits the traditional BI systems when it comes to delivering big data benefits. The way forward is a complete rethink of the way we use BI, in terms of how the data is ingested, stored and analysed. The answer is the Business Data Lake (BDL).