Data lake

A data lake is a system or repository of data stored in its natural/raw format,^[1] usually object blobs or files. A data lake is usually a single store of data including raw copies of source system data, sensor data, social data etc.,^[2] and transformed data used for tasks such as reporting, visualization, advanced analytics, and machine learning. A data lake can include structured data from relational databases (rows and columns), semi-structured data (CSV, logs, XML, JSON), unstructured data (emails, documents, PDFs), and binary data (images, audio, video).^[3] A data lake can be established on premises (within an organization's data centers) or in the cloud (using cloud services).