what-is-druid-memory-mapped-io

Druid is an open-source data processing platform designed for real-time analytics. Druid memory mapped IO is a technique used by Druid to store and access data in memory. Memory-mapped IO allows Druid to access data stored in memory as if it were stored on disk. This technique provides faster access to data and reduces disk I/O, resulting in improved performance. Memory-mapped IO is used extensively in Druid's indexing and querying processes. It enables Druid to perform real-time analytics on large data sets by processing data in memory. Druid's memory-mapped IO is highly optimized for efficient use of memory and can handle large volumes of data with ease.