Recent questions tagged big-data

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Reading the file and populating the associative array

Aug 2, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 2,425 views
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What happens in a MapReduce job when you set the number of reducers to one?

Jul 31, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 3,942 views
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HDFS for customer information file

Jul 31, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 1,847 views
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How a client reads a file from HDFS?

Jul 31, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 3,861 views
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Mappers in Hadoop

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 1,586 views
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Backup and Checkpoint Node

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 6,088 views
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Checkpoint Node in Hadoop

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 2,491 views
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Block Scanner HDFS

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 3,985 views
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Filters in HBase

Jul 31, 2018 in Database by Data_Nerd
 • 2,390 points • 9,027 views
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Compaction HBase

Jul 31, 2018 in Database by Data_Nerd
 • 2,390 points • 1,875 views
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Passing keys and values to the reducers during a standard sort and shuffle phase of MapReduce

Jul 27, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 4,337 views
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Hortonworks vs Cloudera Architecture Difference

Jul 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 2,178 views
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How to create a project for the first time in Hadoop.?

Jul 27, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 2,781 views
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When do reduce tasks start in Hadoop?

Jul 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 2,514 views
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What makes Spark faster than MapReduce?

Jul 27, 2018 in Apache Spark by Neha
 • 6,300 points • 3,086 views
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How compression works in Hadoop?

Jul 27, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 3,389 views
+1 vote
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Reading Performance in Hadoop Cluster

Jul 25, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 2,259 views
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GROUP and COGROUP in PIG

Jul 25, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 5,855 views
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Use of MapReduce in PIG

Jul 25, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 3,588 views
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Difference between a failed task attempt and a killed task attempt

Jul 24, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 4,591 views
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Delete row in HBase

Jul 24, 2018 in Database by Data_Nerd
 • 2,390 points • 3,676 views
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Key Components of HBase

Jul 24, 2018 in Database by shams
 • 3,670 points • 2,958 views
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What metadata is stored on a DataNode when a block is written to it?

Jul 23, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 4,600 views
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Importing a portion of Relational Database to HDFS

Jul 20, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 3,108 views
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How can Hadoop discover missing or corrupt HDFS data?

Jul 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,776 views
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How the FIFO Scheduler arbitrates the cluster resources for a job and its tasks?

Jul 19, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 2,427 views
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Synchronizing sqoop imported data in HDFS

Jul 19, 2018 in Big Data Hadoop by shams
 • 3,670 points • 2,644 views
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Sqoop Metastore ?

Jul 19, 2018 in Big Data Hadoop by shams
 • 3,670 points • 2,372 views
+1 vote
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When I try to execute any Hadoop commands error pops up saying unable to find or load main class M

Jul 17, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 3,739 views
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Data model operations in Hbase

Jul 16, 2018 in Database by shams
 • 3,670 points • 2,413 views
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HLog and WAL in Hbase.

Jul 16, 2018 in Database by shams
 • 3,670 points • 5,400 views
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How does HDFS Federation help HDFS Scale horizontally?

Jul 12, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 2,626 views
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How do I integrate Kdb+ and hadoop?

Jul 12, 2018 in Big Data Hadoop by shubham
 • 7,340 points • 3,568 views
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Connection in Hbase

Jul 11, 2018 in Database by shams
 • 3,670 points • 2,227 views
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Standalone Mode in Hbase

Jul 11, 2018 in Database by shams
 • 3,670 points • 2,913 views
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How to avoid a “split-brain” scenario with NameNodes?

Jul 11, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 6,621 views
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How Namenode handles data node failures?

Jul 11, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 8,605 views
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Bucketing vs Partitioning in HIve

Jul 9, 2018 in Big Data Hadoop by shams
 • 3,670 points • 28,673 views
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Are there any Limitations of Pig?

Jul 6, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 3,106 views
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MapFile in Pig

Jul 6, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,833 views
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Checkpointing in Hadoop

Jul 3, 2018 in Big Data Hadoop by shams
 • 3,670 points • 2,630 views
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Hadoop Nodes for Multiple Disks

Jul 3, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 3,341 views
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How to analyze block placement on datanodes and rebalancing data across Hadoop nodes?

Jun 21, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,475 views
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2 answers

What is the difference between the Smart Data Access of SAP HANA and SAP HANA Vora?

Jun 21, 2018 in Big Data Hadoop by shelly
 • 120 points • 3,094 views
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Is there any way to setup Hadoop nodes (data nodes/namenodes) to use multiple volumes/disks?

Jun 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,541 views
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1 answer

NameNode Status Check

Jun 18, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 3,504 views
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What is Speculative Execution?

Jun 18, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 1,726 views
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Is it mandatory to start Hadoop to run spark application?

Jun 14, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 2,179 views
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Different Hadoop Modes

Jun 13, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 14,757 views
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2 answers

Hadoop fs -stat command

Jun 13, 2018 in Big Data Hadoop by shams
 • 3,670 points • 15,263 views
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