Scaling Namespaces and Optimizing Data Storage
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Cluster management operations

To start and stop a cluster, use the start-dfs.sh and stop-dfs.sh commands respectively. To balance data in a cluster with federated NameNodes, run the HDFS Balancer. To decommission a DataNode from a federated cluster, add the DataNode details to an exclude file and distribute the file among all the NameNodes in the cluster.