Recent questions tagged hadoop

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Determining how many mappers will run?

Aug 9, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 2,568 views
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Example or Use Case of Big Data

Aug 8, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 955 views
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How to assess and compare Hadoop for Business Intelligence?

Aug 8, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 773 views
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How to run Map Reduce program using Ubuntu terminal?

Aug 7, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 4,178 views
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I get an error stating- Hadoop: «ERROR : JAVA_HOME is not set». How to resolve this?

Aug 7, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 6,072 views
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How should I connect Hadoop in C#?

Aug 7, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 2,167 views
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How does Hadoop/Spark is used for building large analytics report?

Aug 7, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 786 views
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Increasing HFile block size

Aug 6, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,001 views
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Designing Schema in HBase

Aug 6, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 848 views
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What are the security guidelines for Impala?

Aug 6, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 912 views
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Cloudera Managing and Compatibality

Aug 6, 2018 in Big Data Hadoop by shams
 • 3,670 points • 553 views
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What are the different ways of Installing Hadoop into our local machine?

Aug 4, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 5,354 views
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Which is the most preferable language for Hadooop Map-Reduce programs?

Aug 4, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 3,839 views
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Is there any way to make Apache Commons Math Library available to MapReducer job at runtime?

Aug 3, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,134 views
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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 • 1,238 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 • 2,111 views
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HDFS for customer information file

Jul 31, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 641 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 • 2,567 views
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Mappers in Hadoop

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 549 views
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Backup and Checkpoint Node

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 3,789 views
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Checkpoint Node in Hadoop

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 1,346 views
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1 answer

Block Scanner HDFS

Jul 31, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 2,528 views
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Filters in HBase

Jul 31, 2018 in Database by Data_Nerd
 • 2,390 points • 7,101 views
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Compaction HBase

Jul 31, 2018 in Database by Data_Nerd
 • 2,390 points • 650 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 • 2,514 views
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Hortonworks vs Cloudera Architecture Difference

Jul 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 910 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 • 1,234 views
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When do reduce tasks start in Hadoop?

Jul 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,078 views
0 votes
1 answer

What makes Spark faster than MapReduce?

Jul 27, 2018 in Apache Spark by Neha
 • 6,300 points • 1,567 views
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1 answer

How compression works in Hadoop?

Jul 27, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 2,040 views
+1 vote
1 answer

Reading Performance in Hadoop Cluster

Jul 25, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 924 views
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1 answer

GROUP and COGROUP in PIG

Jul 25, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 4,266 views
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1 answer

Use of MapReduce in PIG

Jul 25, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 2,352 views
0 votes
1 answer

Difference between a failed task attempt and a killed task attempt

Jul 24, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 3,252 views
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1 answer

Delete row in HBase

Jul 24, 2018 in Database by Data_Nerd
 • 2,390 points • 1,833 views
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1 answer

Key Components of HBase

Jul 24, 2018 in Database by shams
 • 3,670 points • 1,631 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 • 3,203 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 • 1,956 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 • 1,476 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 • 1,043 views
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Synchronizing sqoop imported data in HDFS

Jul 19, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,287 views
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Sqoop Metastore ?

Jul 19, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,343 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 • 2,076 views
0 votes
1 answer

Data model operations in Hbase

Jul 16, 2018 in Database by shams
 • 3,670 points • 969 views
0 votes
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HLog and WAL in Hbase.

Jul 16, 2018 in Database by shams
 • 3,670 points • 3,976 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 • 1,422 views
0 votes
2 answers

How do I integrate Kdb+ and hadoop?

Jul 12, 2018 in Big Data Hadoop by shubham
 • 7,340 points • 1,793 views
0 votes
1 answer

Connection in Hbase

Jul 11, 2018 in Database by shams
 • 3,670 points • 726 views
0 votes
1 answer

Standalone Mode in Hbase

Jul 11, 2018 in Database by shams
 • 3,670 points • 1,502 views
0 votes
1 answer

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

Jul 11, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 4,607 views
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