Distributed system, Apache Hadoop architecture, complex network structure, multiple nodes, master node, slave nodes, data processing, big data storage, clusters, racks, servers, CPUs, hard drives, cables, wires, circuit boards, fans, LED lights, data center, server room, air conditioning, backup power supply, switches, routers, firewall, network devices, 3D futuristic composition, neon light, dark blue tone, highly detailed texture, metallic material, complex structure, abstract background.