What is single point of failure ?



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It is told that HDFS has single point of failure. Can you explain How ?

1 Answer(s)


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hi Ravikumar,

In HDFS there is only one Master (NameNode), when this NN is down due to hardware issues then there is no way to access the data that is stored in data nodes. Because of this Master is the single point of failure in Hadoop.

Hadoop 2.0 aims to break this concept by providing federation support where you can have more than one master.

Thanks

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