Methodologies that handle large and complex data sets at high velocity are referred to as what?

The term that describes methodologies handling large and complex data sets at high velocity is "big data." Big data encompasses not only the vast quantity of data but also the swift processing and analysis of this data to extract valuable insights. It involves technologies and tools specifically designed to accommodate the characteristics of big data, often known as the "three Vs": volume, velocity, and variety. This allows organizations to make informed decisions and derive analytics from data that traditional data processing software cannot effectively manage.

Data mining, on the other hand, refers to the process of discovering patterns and extracting information from large sets of data but does not specifically address the velocity aspect inherent in big data technologies. Information analysis is a broader term that may refer to various methods of examining data but lacks the specific association with high-velocity data handling. Data warehousing relates more to the storage and management of data, not directly to the methodologies for processing high-velocity datasets. Considering these contexts, big data is the most fitting term for the scenario described in the question.