java - Using Distributed cache and FileReader on single node Cluster -

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Many node clusters or single node clusters are sufficient to use distributed caches, giving the path of the FileReader file directly stored in HDFS Can open the file.

This is not really necessary. The main purpose behind using distributed caches is to create available resources for all mappers or reducers running on all nodes in all the clusters, which does not have much meaning on the same machine. You can also have a global variable in your mapetred code on a node Hauup cluster, and this must be done by the trick.

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