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HADOOP - what is a datanode?

asked SRVMTrainings March 5, 2013 02:26 PM  

what is a datanode?


2 Answers

answered By harirao123   0  
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Datanode is a daemon in architecture and there are multiple instances of datanodes depending upon the size of the cluster and these are slaves of hadoop architecture, and data nodes report to Namenode. Data nodes stores the data. Datanodes are the slaves which are deployed on each machine and provide the actual storage. These are responsible for serving read and write requests for the clients.
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answered By Robin   0  
There are a Number of datanodes, usually one per node in the cluster, which manage storage attached to the nodes.
Internally , a file is split into one or more blocks and these blocks are stored in a set of datanodes.
The Datanodes are responsible for serving read and write requests from the file system's clients
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answered By rajaniikanth   0  
data node is what where actual data resides in the Hadoop HDFS system. For the same meta info is maintained at Name node, which chunk is in which node ....:P
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