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How does inter cluster data copying works in Hadoop?

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In Hadoop, there is a utility called DistCP (Distributed Copy) to perform large inter/intra-cluster copying of data. This utility is also based on MapReduce. It creates Map tasks for files given as input.

After every copy using DistCP, it is recommended to run crosschecks to confirm that there is no data corruption

 

and copy is complete.

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