Datanode

A DataNode is a key component in a distributed storage system, often used in big data environments, such as Hadoop. It stores actual data blocks and manages the storage and retrieval of data. DataNodes work together in clusters, distributing the data across multiple machines to ensure reliability and efficiency. Each DataNode regularly reports its status and health to the system, helping maintain data integrity and availability. Essentially, they are the building blocks that allow large amounts of data to be stored and accessed effectively across many interconnected computers.