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HADOOP - What is a DataNode? How many instances of DataNode run on a Hadoop Cluster?




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asked SRVMTrainings February 14, 2014 05:48 AM  

What is a DataNode? How many instances of DataNode run on a Hadoop Cluster?


           

2 Answers



 
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there are typically lote of dats nodsnods
It managed data bocks
data nodes is Replicated -failure does not inpact cluster

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answered By   0  
Data node is the actual place where the data is stored and, task given by tasktracker will be executed.
there is no limit for number of datanodes in a cluster, more nodes results larger cluster handles more and more data.
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