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How do I set up a hadoop node to use multiple volumes?

April 26, 2017hadoop Node

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How do I set up a hadoop node to use multiple volumes?

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Data-nodes can store blocks in multiple directories typically allocated on different local disk drives. In order to setup multiple directories one needs to specify a comma separated list of pathnames as a value of the configuration parameter dfs.datanode.data.dir. Data-nodes will attempt to place equal amount of data in each of the directories.