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In a Hadoop cluster, what is true for a HDFS block that is no longer available due to disk corruption or machine failure? Group of
In a Hadoop cluster, what is true for a HDFS block that is no longer available due to disk corruption or machine failure?
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The namenode allows new client request to keep trying to read it
The Mapreduce job process runs ignoring the block and the data stored in it
It is lost for ever
It can be replicated from its alternative locations to other live machines.
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