HDFS architecture, distributed file system, master-slave structure, Namenode, Datanode, Secondary Namenode, data blocks, replication factor, rack-aware node placement, high availability, fault tolerance, scalable storage, big data processing, cloud computing, modern data center, abstract blueprints, futuristic ambiance, neon lights, metal grids, holographic displays, 3D visualization, low-angle shot, cinematic composition, dramatic lighting.