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A step-by-step guide to implementing HDFS Federation with ViewFS to overcome NameNode memory limits by distributing namespace across multiple nameservices while sharing DataNodes.
Apache Hadoop HDFS Federation utilizes ViewFs to present a unified global namespace to clients while distributing metadata across multiple independent NameNodes. This architecture prevents the memory bottlenecks associated with a single NameNode by partitioning the namespace. A primary constraint in this design is that the ViewFs mount table is typically man
hadoop