August 2017
Beginner to intermediate
284 pages
6h 51m
English
Content preview from Mastering Apache Storm
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Datanode
The datanode is responsible for storing user data in HDFS clusters. There can be multiple datanodes in an HDFS cluster. A datanode stores data on the physical disks attached to the system hosting the datanode. It is not recommended to store datanode data on disks in a RAID configuration as HDFS achieves data protection by replicating data across datanodes.
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