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 • 1,586 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 • 2,518 views
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HDFS for customer information file

Jul 31, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 943 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 • 2,899 views
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Mappers in Hadoop

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 862 views
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Backup and Checkpoint Node

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 4,663 views
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Checkpoint Node in Hadoop

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 1,693 views
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Block Scanner HDFS

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 2,914 views
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Filters in HBase

Jul 31, 2018 in Database by Data_Nerd
 • 2,390 points • 7,760 views
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Compaction HBase

Jul 31, 2018 in Database by Data_Nerd
 • 2,390 points • 974 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 • 2,994 views
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Hortonworks vs Cloudera Architecture Difference

Jul 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,281 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 • 1,657 views
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When do reduce tasks start in Hadoop?

Jul 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,489 views
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What makes Spark faster than MapReduce?

Jul 27, 2018 in Apache Spark by Neha
 • 6,300 points • 2,018 views
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How compression works in Hadoop?

Jul 27, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 2,442 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 • 1,364 views
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GROUP and COGROUP in PIG

Jul 25, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 4,818 views
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Use of MapReduce in PIG

Jul 25, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 2,738 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 • 3,605 views
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1 answer

Delete row in HBase

Jul 24, 2018 in Database by Data_Nerd
 • 2,390 points • 2,228 views
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Key Components of HBase

Jul 24, 2018 in Database by shams
 • 3,670 points • 1,995 views
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1 answer

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 • 3,613 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 • 2,296 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 • 1,799 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 • 1,350 views
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Synchronizing sqoop imported data in HDFS

Jul 19, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,773 views
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Sqoop Metastore ?

Jul 19, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,628 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 • 2,524 views
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Data model operations in Hbase

Jul 16, 2018 in Database by shams
 • 3,670 points • 1,397 views
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1 answer

HLog and WAL in Hbase.

Jul 16, 2018 in Database by shams
 • 3,670 points • 4,379 views
0 votes
1 answer

How does HDFS Federation help HDFS Scale horizontally?

Jul 12, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 1,727 views
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2 answers

How do I integrate Kdb+ and hadoop?

Jul 12, 2018 in Big Data Hadoop by shubham
 • 7,340 points • 2,249 views
0 votes
1 answer

Connection in Hbase

Jul 11, 2018 in Database by shams
 • 3,670 points • 1,097 views
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1 answer

Standalone Mode in Hbase

Jul 11, 2018 in Database by shams
 • 3,670 points • 1,852 views
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1 answer

How to avoid a “split-brain” scenario with NameNodes?

Jul 11, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 5,258 views
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1 answer

How Namenode handles data node failures?

Jul 11, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 7,004 views
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Bucketing vs Partitioning in HIve

Jul 9, 2018 in Big Data Hadoop by shams
 • 3,670 points • 27,639 views
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Are there any Limitations of Pig?

Jul 6, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 2,222 views
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1 answer

MapFile in Pig

Jul 6, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,038 views
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Checkpointing in Hadoop

Jul 3, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,748 views
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Hadoop Nodes for Multiple Disks

Jul 3, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 2,354 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 • 1,370 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 • 1,830 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 • 1,349 views
0 votes
1 answer

NameNode Status Check

Jun 18, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 2,688 views
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1 answer

What is Speculative Execution?

Jun 18, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 936 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 • 1,207 views
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1 answer

Different Hadoop Modes

Jun 13, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 13,559 views
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2 answers

Hadoop fs -stat command

Jun 13, 2018 in Big Data Hadoop by shams
 • 3,670 points • 12,634 views
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