Hadoop ecosystem, distributed computing, big data processing, cluster architecture, master node, slave nodes, rack awareness, high availability, fault tolerance, HDFS blocks, Namenode, Datanode, YARN Resource Manager, NodeManager, ApplicationMaster, Container, MapReduce jobs, Spark SQL, Hive queries, Flume event processing, Kafka message queue, ZooKeeper configuration management, HBase NoSQL database, Oozie workflow scheduler, Ambari cluster management, Hortonworks Data Platform, Cloudera distribution, CentOS Linux operating system, data center, server racks, network switches, cooling systems, softbox lighting, panoramic view.