Hadoop Distributed File System (HDFS) architecture, blueprints, diagrams, complex networks, multiple nodes, Namenode, Datanode, secondary Namenode, journal node, data blocks, replication factor, rack awareness, high availability, fault tolerance, distributed storage, big data, cloud computing, modern data center, futuristic background, neon lights, circuit boards, wires, metal casing, LED indicators, holographic displays, 3D visualization, isometric perspective, low-angle shot, dramatic lighting, atmospheric fog.