hadoop 50070

. Specific practices are as follows(1) First shut down the virtual machine's iptables command chkconfig iptables off/on shut down and turn on service iptables stop/service iptables start stop and open I was using the back This (2) Setting up the virtual machine's network because we are the NAT mode need to do the following first shut down the Windows Firewall, and then click on the virtual machine edit-"Virtual network editor-" Check VMnet-8 Click Set NAT Settings--"Add port mappingI set up 2 po

We know that the Hadoop cluster is fault-tolerant, distributed and so on, why it has these characteristics, the following is one of the principles. Distributed clusters typically contain a very large number of machines, and due to the limitations of the rack slots and switch ports, the larger distributed clusters typically span several racks, and the machines on multiple racks form a distributed cluster. The network speed between the machines in the

1) HDFs File System Preparation workA) # Hadoop fs–ls/user/root #查看hdfs文件系统b) # Hadoop fs-rm/user/root/output02/part-r-00000c) Delete the document, delete the folderd) # Hadoop fs-rm–r/user/root/output02e) # Hadoop fs–mkdir–p INPUT/NCDCf) Unzip the input file and Hadoop does

This article is derived from the deep analysis of Hadoop Technology Insider design and implementation principles of Hadoop common and HDFs architectureFirst, the basic concept of Hadoop Hadoop is an open source distributed computing platform under the Apache Foundation, with the core of the

I. Introduction to the Hadoop releaseThere are many Hadoop distributions available, with Intel distributions, Huawei Distributions, Cloudera Distributions (CDH), hortonworks versions, and so on, all of which are based on Apache Hadoop, and there are so many versions is due to Apache Hadoop's Open source agreement: Anyone can modify it and publish/sell it as an op

1. Install hadoop First, extract the downloaded hadoop 0.20 package to the/home/Admin directory: Tar xzfhadoop-0.20.2.tar.gz Configure hadoop environment variables: Exporthadoop_install =/home/admin/hadoop-0.20.2 Exportpath = $ path: $ hadoop_install/bin Test whether the installation is successful:

Ubuntu System (I use the version number is 140.4)The Ubuntu system is a desktop-based Linux operating system, and Ubuntu is built on the Debian distribution and GNOME desktop environments. The goal of Ubuntu is to provide an up-to-date, yet fairly stable, operating system that is primarily built with free software for the general user, free of charge and with community and professional support.As a Hadoop big data development test environment, it is r

Hadoop is mainly deployed and applied in the Linux environment, but the current public's self-knowledge capabilities are limited, and the work environment cannot be completely transferred to the Linux environment (of course, there is a little bit of selfishness, it's really a bit difficult to use so many easy-to-use programs in Windows in Linux-for example, quickplay, O (always _ success) O ~), So I tried to use eclipse to remotely connect to

We all know that an address has a number of companies, this case will be two types of input files: address classes (addresses) and company class (companies) to do a one-to-many association query, get address name (for example: Beijing) and company name (for example: Beijing JD, Beijing Associated information for Red Star).Development environmentHardware environment: Centos 6.5 server 4 (one for master node, three for slave node)Software Environment: Java 1.7.0_45,

/bin/"Linux- from: ~ # export path= $JAVA _home: $PATHThe second, permanent Wayvi /etc/profile, add the following content: Java_home=/usr/local/jdk1. 7. 0_03/Path= $PATH: $JAVA _home/binexport path Java_homeSave the profile file and execute source/etc/profile to let the settings take effect immediately.2> However, the java_home configured here does not work and is configured in conf/hadoop-env.sh. Then copy all the configuration files under Node1/conf

: hadoopinstal/doc/core-default.html 2.2.2 set the hdfs-site.xml as follows: Detailed configuration item reference: hadoopinstal/doc/hdfs-default.html 2.2.3 set mapred-site.xml, as follows: Detailed configuration item reference: hadoopinstal/doc/mapred-default.html Iv. Format hadoop run hadoop Run the following command on the console: hadoop nam

port is occupied by 127.0.1.1, so there will be an exception C: The command to format the file system should be HDFs Namenode-format D:hadoop Services and yarn services need to be started separately start-dfs.sh start-yarn.sh E: Configure all the configuration files on the primary node and copy them directly from the node F: Unlike when doing a single node example, I need to make a specific path when copying files, such as this: Originally directly executed $ bin/hdfs dfs-put etc/

java_home=/usr/java/jdk1.7.0_65-------------------JAVA installation directoryThe second one: Core-site.xml Third: Hdfs-site.xml Fourth: Mapred-site.xml (MV Mapred-site.xml.template mapred-site.xml)MV Mapred-site.xml.template Mapred-site.xmlVim Mapred-site.xmlFifth one: Yarn-site.xml3.2 Adding Hadoop to an environment variableVim/etc/proflieExport java_home=/usr/java/jdk1.7.0_65Export hadoop_home=/itcast/