Recent questions under tag hadoop

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Hadoop UI Web Interface

posted May 9, 2018 by Bargavi Kalla

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Which demon is responsible for replication of data in Hadoop? [MCQ]

posted Nov 30, 2017 by anonymous

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The archive file created in Hadoop always has the extension of [MCQ]

posted Nov 30, 2017 by anonymous

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The inter process communication between different nodes in Hadoop uses [MCQ]

posted Nov 30, 2017 by anonymous

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How to write a Job for importing Files from an external Rest API into Hadoop

posted Jul 30, 2017 by anonymous

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How to get info about which data in hdfs or file system that a MapReduce job visits?

posted Jul 27, 2017 by anonymous

+2 votes

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What are the different types of tombstone markers in HBase for deletion?

posted Jul 26, 2017 by Karthick.c

+2 votes

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What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

posted Jul 26, 2017 by Karthick.c

+1 vote

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Whenever a client submits a hadoop job, who receives it?

posted Jul 14, 2017 by Karthick.c

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What is a rack awareness and on what basis is data stored in a rack?

posted Jul 14, 2017 by Karthick.c

+1 vote

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What is Job Tracker role in Hadoop?

posted Jul 11, 2017 by Karthick.c

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Define DataNode and how does NameNode tackle DataNode failures in HADOOP?

posted Jul 11, 2017 by Karthick.c

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Explain the difference between HBase and Hive?

posted Jun 30, 2017 by Karthick.c

+2 votes

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Explain about the partitioning, shuffle and sort phase in Hadoop?

posted Jun 30, 2017 by Karthick.c

+1 vote

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What is a block and block scanner in HDFS?

posted Jun 22, 2017 by Karthick.c

+2 votes

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What is the best hardware configuration to run Hadoop?

posted Jun 22, 2017 by Karthick.c

+1 vote

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What concept that Hadoop framework works?Please explain with example?

posted Jun 21, 2017 by Karthick.c

+1 vote

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What is the difference between Hadoop and Traditional RDBMS?

posted Jun 21, 2017 by Karthick.c

+2 votes

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What is the process to change the files at arbitrary locations in HDFS?

posted Jan 11, 2017 by Jdk

+1 vote

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Explain the difference between NAS and HDFS?

posted Jan 11, 2017 by Jdk

+2 votes

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How can you overwrite the replication factors in HDFS?

posted Jan 11, 2017 by Jdk

+1 vote

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What are the different operational commands in HBase at record level and table level?

posted Dec 26, 2016 by Karthick.c

+1 vote

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How to write a custom partitioner for a Hadoop MapReduce job?

posted Dec 26, 2016 by Karthick.c

+2 votes

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Explain about the process of inter cluster data copying?

posted Dec 22, 2016 by Karthick.c

+1 vote

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Explain the difference between NameNode, Backup Node and Checkpoint NameNode?

posted Dec 22, 2016 by Karthick.c

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Hadoop Java API to get maximum-am-resource-percent?

posted Dec 22, 2016 by anonymous

+4 votes

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Please explain Hadoop Architecture?

posted Dec 20, 2016 by Karthick.c

+3 votes

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Why Hadoop doesn’t support Updates and append?

posted Nov 29, 2016 by Shyam

+2 votes

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What is Hadoop Ecosystem?

posted Nov 29, 2016 by Shyam

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Windows and Linux hadoop cluster

posted Jul 20, 2016 by anonymous

+2 votes

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Can technology in Database engines like MySQL, Oracle be changed so they work like Hadoop?

posted May 27, 2016 by Abhay

+2 votes

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How to include hadoop jars in oozie package

posted May 18, 2016 by anonymous

+2 votes

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MongoDB Hadoop Connector Set-up on EC2?

posted Apr 18, 2016 by Deepti Singh

+1 vote

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How to learn hadoop mapReduce on mongodb in java

posted Apr 12, 2016 by anonymous

+1 vote

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Control rate of preemption in Yarn?

posted Apr 11, 2016 by anonymous

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Is it possible to turn on data node encryption without kerberos?

posted Apr 6, 2016 by anonymous

+1 vote

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How a job works in YARN/Map Reduce? like navigation path...

posted Apr 6, 2016 by Bob Wise

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What happens to a read operation when the file is moved to trash in HDFS?

posted Mar 8, 2016 by Naveena Garg

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Something kill hadoopuser applications

posted Feb 13, 2016 by anonymous

+1 vote

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Provisioning a physical host into an existing HDFS/Yarn cluster

posted Jan 26, 2016 by anonymous

+1 vote

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Hadoop: Unable to view logs through Web UI + Amazon EC2

posted Jan 19, 2016 by anonymous

+1 vote

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Uneven load balance between hadoop cluster

posted Jan 18, 2016 by anonymous

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Can the blocks be broken in HDFS file system?

posted Nov 25, 2015 by anonymous

+2 votes

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How do I customize data placement on DataNodes (DN) of Hadoop cluster?

posted Oct 27, 2015 by Sudhakar Singh

+2 votes

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How to find min, max and mean of wordcount from text file in hadoop mapreduce?

posted Oct 16, 2015 by Sathish

+3 votes

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Hadoop client setup to access remote cluster

posted Oct 7, 2015 by anonymous

+3 votes

1 answer

Is there a way to run Mapreduce with mongodb as input and output to HDFS?

posted Oct 1, 2015 by anonymous

+1 vote

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Issue about enable UseNUMA flag in hadoop framework

posted Sep 19, 2015 by anonymous

+1 vote

1 answer

Questions about usage of Hadoop built-in examples

posted Sep 14, 2015 by anonymous

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Unable to use ./hdfs dfsadmin -report with HDFS Federation

posted Aug 24, 2015 by Bob Wise