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Hadoop data processing (sophomore training in 2020) 1, Project background The training content is the statistical analysis of automobile sales data. Through this project, we will deepen our understanding of HDFS distributed file system and MapReduce distributed parallel computing framework, master and apply them skillfully, experience the dev ...

Reference link 1 Reference link 2 The code comes from link 2 and has been modified by yourself. The level is limited. I hope to point out some mistakes. hadoop3. 2.1 write code under centos 7 window, package and submit it to Hadoop cluster on centos for operation.   ideas:   put the picture on hdfs, and then write the path of each im ...

Hadoop[03-03] access count test based on DFS and ZKFC (Hadoop 2.0) Prepare the environment Prepare multiple virtual machines and start dfs and zookeeper See link for details: Hadoop2.0 start DFS and Zookeeper Some data of multiple virtual machines are as follows numberhost nameHost domain nameip address①ToozkyToozky192.168.64.220②Toozky2T ...

Introduction: MapReduce is a cluster based high-performance parallel computing platform. MapReduce is a software framework for parallel computing and operation. MapReduce is a parallel programming model and methodcharacteristic: ① The distribution is reliable. The operation of the data set is distributed to multiple nodes in the cluster to ac ...

HADOOP installation Linux stand-alone Download Hadoop Hadoop3.xx download address: http://archive.apache.org/dist/hadoop/common/hadoop-3.1.3/ Upload to Linux via FTP Decompression software tar -zxvf hadoop-3.1.3.tar.gz -C /opt/module/ Configure HADOOP environment variables Create custom profile vim /etc/prof ...

preface Part of the content is extracted from the training materials of Shang Silicon Valley, dark horse and so on 1. Get to know MapReduce 1.1 understand MapReduce idea   MapReduce thought can be seen everywhere in life, and everyone has been exposed to it more or less. The core idea of MapReduce is "divide and then combine ...

Exception code description Just beginning to contact Hadoop，about MapReduce From time to time, I especially understand that the following records the problems and solutions that have been tangled for a day 1. Execute MapReduce task hadoop jar wc.jar hejie.zheng.mapreduce.wordcount2.WordCountDriver /input /output 2. Jump out of exception ...

Mapper class // // Source code recreated from a .class file by IntelliJ IDEA // (powered by Fernflower decompiler) // package org.apache.hadoop.mapreduce; import java.io.IOException; import org.apache.hadoop.classification.InterfaceAudience.Public; import org.apache.hadoop.classification.InterfaceStability.Stable; @Public @Stable public cla ...

1. Introduction to big data 1.1 big data concept big data refers to a data set that cannot be captured, managed and processed by conventional software tools within a certain time range. It is a massive, high growth rate and diversified information asset that requires a new processing mode to have stronger decision-making power, insight an ...

First, build haoop2.0 of eclipse 7.1 development environment, the resources used are linked as follows: Install Hadoop 2.0 for windows 7.1 environment Building hadoop development environment under eclipse In this way, we can develop hadoop in eclipse catalogue 1, Introduction to MapReduce model 1. Map and Reduce functions 2. MapReduce a ...