How many Daemon processes run on a Hadoop system?
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What is the meaning of speculative execution in Hadoop? Why is it important?
What is inputformat in hadoop?
Is secondary namenode a substitute to the namenode?
What are different hdfs dfs shell commands to perform copy operation?
What hadoop does in safe mode?
What is difference between regular file system and HDFS?
How to enable/configure the compression of map output data in hadoop?
How does NameNode tackle DataNode failures?
Which data storage components are used by hadoop?
What is the function of NodeManager?
What is output format in hadoop?
What stored in HDFS?
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