Data Lake

Definition

A centralised repository that stores large volumes of raw data in its native format — structured, semi-structured, and unstructured — until it is needed for analysis. Unlike data warehouses, which store data in predefined schemas, data lakes use a schema-on-read approach that provides flexibility for diverse analytical workloads including machine learning, real-time analytics, and ad hoc exploration. Data lakes are a significant technology intangible asset, with value derived from the breadth and depth of data they contain and the analytical capabilities they enable.