Скачать или смотреть 808 HDFS Architecture-1

Hadoop is based on Name and Data Nodes. NameNode often called as Master Node is the main computer in the Architecture. Nodes are simple computers stacked in a Rack and connected by Switches to a NameNode. Nodes are often called Slaves or Data Nodes. The overall architecture is defined as a Master-Slave architecture. The architecture is based on the idea called redundancy. This redundancy is achieved through data replication across several Nodes in the distributed system. Data is saved copied in several spaces named as "Block". In this video we talk with diagram about HDFS architecture that will help visualize this concept.