MapReduce is an algorithm for processing huge datasets on certain kinds of distributable problems using a large number of nodes
I have a very simple "Hello world" style map/reduce job. public class Tester extends Configured implements Tool { @Override public …
java hadoop mapreduce hortonworks-data-platformI'm trying to use MongoDB to analyse Apache log files. I've created a receipts collection from the Apache access logs. …
mongodb mapreduceI have a map reduce program running to read the HDFS file as below: hadoop jar /opt/mapr/hadoop/hadoop-0.20.2/…
python hadoop mapreduce hive sequencefileI have a list of Java Objects and I need to reduce it applying Aggregate Functions like a select over …
java database mapreduce data-processingI have a large number of image files that I need to store and process on HDFS Let's assume 2 scenarios: …
image hadoop mapreduce hbase random-accessI am a bit confused with the output I get from Mapper. For example, when I run a simple wordcount …
hadoop mapreduce hadoop2When running a MapReduce job with a specified combiner, is the combiner run during the sort phase? I understand that …
hadoop mapreduce combinersI have a comma seperated .txt file, I want to DUMP the AVG age of all Males. records = LOAD 'file:/…
hadoop mapreduce apache-pig bigdata