Presto
Presto is an open-source distributed SQL query engine designed for fast, interactive analytics on large datasets across various data sources, including Hadoop, cloud storage, and relational databases. It enables users to run SQL queries on petabytes of data without moving it, using a massively parallel processing (MPP) architecture. Originally developed at Facebook, it is widely used for ad-hoc querying and business intelligence applications.
Developers should learn Presto when they need to perform high-speed, interactive SQL queries on massive, heterogeneous datasets, such as in data warehousing, log analysis, or real-time analytics. It is particularly valuable in environments with data stored in multiple systems (e.g., HDFS, S3, MySQL) because it can query them directly without data migration. Use cases include powering dashboards, ETL processes, and exploratory data analysis in big data ecosystems.