Recent questions tagged mapreduce

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Want to have an idea on Hadoop Machine Learning and Data Mining project.

Aug 14, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 1,141 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 • 3,474 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 • 2,264 views
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1 answer

What makes Spark faster than MapReduce?

Jul 27, 2018 in Apache Spark by Neha
 • 6,300 points • 1,344 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 • 1,582 views
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How can I compare the elements of the RDD using MapReduce?

May 24, 2018 in Apache Spark by code799
 • 3,273 views
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Java MapReduce error saying No FileSystem for scheme:hdfs

May 9, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 2,477 views
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“no such file or directory" in case of hadoop fs -ls

May 9, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 7,989 views
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Does setup & clean methods in Hadoop MapReduce is executed after each task?

May 8, 2018 in Big Data Hadoop by king_of_code
 • 2,106 views
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Submitting MapReduce job using jobConf object vs job object

May 4, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,726 views
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Which Data Structure is used in case of Map Reduce?

May 4, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,371 views
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Setting the Number of Map tasks and Reduce Tasks not Working

May 4, 2018 in Big Data Hadoop by Atul
 • 10,240 points • 1,337 views
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1 answer

Hadoop giving java.io.IOException, in mkdir Java code.

May 3, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 2,403 views
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Hadoop job getting executed in local mode only?

May 3, 2018 in Big Data Hadoop by Atul
 • 10,240 points • 2,279 views
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1 answer

Why is Spark faster than Hadoop Map Reduce

Apr 30, 2018 in Apache Spark by Data_Nerd
 • 2,390 points • 1,182 views
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1 answer

What is the function of getLocalCacheArchives method?

Apr 29, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 685 views
+1 vote
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Why is jar file required to execute a MR code instead of class file?

Apr 24, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,121 views
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How to transfer data from Netezza to HDFS using Apache Sqoop?

Apr 23, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,571 views
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Hadoop demo Code not working

Apr 20, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 714 views
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1 answer

How to work with distributed cache in Hadoop?

Apr 20, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,239 views
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How to implement data locality in Hadoop MapReduce?

Apr 20, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 981 views
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Declaring separator in the MapReduce(Hadoop 0.20)

Apr 20, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 473 views
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1 answer

Getting error in Custom Input Format

Apr 19, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 525 views
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1 answer

Error in Hadoop Mapreduce

Apr 19, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 980 views
0 votes
1 answer

Getting error in Hadoop: Output file already exist

Apr 19, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 8,246 views
0 votes
1 answer

Hadoop single node cluster set up issues

Apr 19, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 754 views
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1 answer

Map and Reduce task memory settings in Hadoop YARN

Apr 18, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,093 views
0 votes
1 answer

How to set the number of Map & Reduce tasks?

Apr 18, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,735 views
0 votes
1 answer

Getting error in Hadoop Streaming: Type mismatch in Key from Map

Apr 18, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,097 views
0 votes
1 answer

Replication Factor in Hadoop?

Apr 18, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,128 views
0 votes
1 answer

Is there any way to write "map only" Hadoop jobs ?

Apr 16, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 734 views
0 votes
1 answer

Moving files in Hadoop using the Java API?

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 2,568 views
0 votes
11 answers

What is the command to start Job history server in Hadoop 2.x & how to get its UI?

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 20,337 views
0 votes
2 answers

Hadoop query regarding setJarByClass method of Job class

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 2,187 views
0 votes
1 answer

Getting error in MapReduce job.setInputFormatClass

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 1,957 views
0 votes
1 answer

Is java necessary for Hadoop?

Apr 11, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 537 views
0 votes
1 answer

How do I parse pdf file using MapReduce?

Apr 11, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,407 views
0 votes
1 answer

What is the difference between a zero reducer and identity reducer in Hadoop Mapreduce?

Apr 10, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 2,352 views
0 votes
1 answer

How to use custom FileInputFormat in MapReduce?

Apr 10, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 980 views
0 votes
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Can one implement combiner and reducer separately?

Apr 10, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 950 views
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1 answer

IDE for writing and running hadoop jobs?

Apr 10, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,706 views
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1 answer

How to configure secondary namenode in Hadoop 2.x ?

Apr 6, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,613 views
0 votes
1 answer

which one to choose for log analysis?

Apr 6, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 608 views
0 votes
1 answer

How to get started with Hadoop and do some development using Eclipse IDE?

Apr 4, 2018 in Big Data Hadoop by Damon Salvatore
 • 5,980 points • 1,912 views
0 votes
1 answer

Apache Hadoop Yarn example program

Apr 4, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,031 views
0 votes
1 answer

When is an identity mapper/reducer used?

Apr 3, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 2,073 views
0 votes
1 answer

Where is Hadoop Classpath?

Apr 2, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 4,349 views
0 votes
1 answer

How hadoop mapreduce job is submitted to worker nodes?

Mar 30, 2018 in Big Data Hadoop by Damon Salvatore
 • 5,980 points • 5,447 views
0 votes
1 answer

Why we are configuring mapred.job.tracker in YARN?

Mar 29, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,698 views
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1 answer

Is there a good online tutorial for Hadoop development on a Windows 7 machine?

Mar 29, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 482 views
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