Home > Workload Solutions > Data Analytics > Guides > Dell PowerScale and Cloudera Private Cloud Data Platform on PowerEdge Servers Powered by AMD > Dell PowerScale distributed storage array for HDFS
The PowerScale storage nodes provide the HDFS NameNode and DataNode services instead of having the services be assigned to the Master nodes and Worker nodes.
PowerScale OneFS implements data durability internally and uses a private backend network for internal operations. A single copy of the data is transferred to the PowerScale storage nodes when Worker nodes write to HDFS. No replication traffic occurs on the Cluster Data network. Also, HDFS recovery traffic for failed drives or nodes does not occur on the Cluster Data network.