Is all the datanodes should have same configuration in the cluster?
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Is all the datanodes should have same configuration in the cluster?
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No, it is not necessary that all the datanodes should have same configuration in Hadoop . But it is recommended to have the same configuration for the sake of performance and scalability. If the configuration of all datanodes is same then only the throughput of every datanode will be same.
Suppose there are 2 Datanodes, DN1 and DN2. DN1 is having low configuration than DN2. So, DN1 will take more time in performing various operations as compared to DN2. This will slow down the overall execution time and affect the performance of the whole Hadoop cluster.
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