hadoop setup

Today to open an account to configure Hadoop, but all finished, run, there is no Java found in the case, my Java is set in the. ZSHRC, export Java_home=/usr/lib/jvm/java, in the original is available, But not this time, and then found the solution on the Internet, into the hadoop/libexec/hadoop-config.sh, and then #attempt to set Java_home if it no set before add

Always focused on Hadoop projects, and recently found that you can build Hadoop under Windows.decided to give it a try. The gossip is less.Prepare a Windows 7 32-bit environment first,(official online said does not support 64-bit, compile will be problematic, not to say why, if you want to use on the Windows 64-bit machine, you can compile in 32-bit environment to 64-bit, and then deploy to 64-bit machine)R

Reproduced in: http://blog.csdn.net/lazythinker/article/details/6931651 1. Download and configure cygwin 1. Create a system variable cygwin with the variable value ntsc tty] 2. Edit the system variable "path" and add "C: \ cygwin \ bin] Ii. install Java Configure java_home; 3. Configure eclipse 1. Put the conins hadoop-*-eclipse-plugin.jar under the contrib/directory under the hadoop installation package

First of all, to ask, what is CDH?To install a Hadoop cluster that deploys 100 or even 1000 servers, package I including hive,hbase,flume ... Components, a day to build the complete, there is to consider the system after the update asked questions, then need to CDH Advantages of the CDH version:Clear Version DivisionFaster version updateSupport for Kerberos security authenticationDocument Clarity (Official document)Supports multiple installation metho

1. ConfigurationNamenode Hdfs-site.xml is the Dfs.webhdfs.enabled property must be set to true, otherwise you will not be able to use Webhdfs liststatus, listfilestatus, etc. need to list files, The folder Status command, because this information is saved by Namenode.Add attributes to/etc/hadoop/conf/hdfs-site.xml in Namenode and one datanode:2. Instructions for useAccess Namenode HDFs using port 50070, Access Datanode Webhdfs using 50075 ports. Acces

Step OneIf not, do not set up the HBase development environment blog, see my next blog.HBase Development Environment Building (Eclipse\myeclipse + Maven)　　Step one, need to add. As follows:In the project name, right-click,Then, write Pom.xml, here not much to repeat. SeeHBase Development Environment Building (Eclipse\myeclipse + Maven)When you are done, write the code, right.Step two some steps after the HBase development environment is built (export exported jar package or Ant mode)Here, do not

?Introduction: VMware can run two or more windows, DOS, and Linux systems simultaneously on an individual local laptop machine. VMware uses a completely different concept than a "multi-boot" system. A multi-boot system can only run one system at a time, and the machine needs to be restarted when the system switches. VMware is truly "simultaneous" running, with multiple operating systems on the main system platform, just as the standard Windows application switches. And each operating system you

1. Configuration Namenode Hdfs-site.xml is the Dfs.webhdfs.enabled property must be set to true, otherwise you will not be able to use Webhdfs liststatus, listfilestatus, etc. need to list files, The folder Status command, because this information is saved by Namenode. Add attributes to/etc/hadoop/conf/hdfs-site.xml in Namenode and one datanode: Double-click code Select All 1 2 3 4 2. Instructions for use Access Namenode HDF

First, let's take a look at the problem here, so as not to forget it. If you have time, you can get a detailed tutorial to play. The online tutorial is either an old version or an old version, or you just didn't say it to the point. 1. Disable IPv6 Configuration on the server. 2.if winutils.exe is not found, the system variable cannot be set with hadoop_home. environment variables can be directly set in the program, saving system configuration and making it easier. System. setproperty ("

Install times wrong: Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7:run (site) on project Hadoop-hdfs:an Ant B Uildexception has occured:input file/usr/local/hadoop-2.6.0-stable/hadoop-2.6.0-src/hadoop-hdfs-project/ Hadoop-hdfs/target/findbugsxml.xml

=org.apache.hadoop.tools.HadoopArchives CLASSPATH=${CLASSPATH}:${TOOL_PATH} HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"elif [ "$COMMAND" = "sampler" ] ; then CLASS=org.apache.hadoop.mapred.lib.InputSampler HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"else CLASS=$COMMANDfi 4. Set the local database # setup ‘java.library.path‘ for native-hadoop code if necessaryJAVA_LIBRARY_PATH=‘‘if [ -d "

Hadoop Foundation----Hadoop Combat (vi)-----HADOOP management Tools---Cloudera Manager---CDH introduction We have already learned about CDH in the last article, we will install CDH5.8 for the following study. CDH5.8 is now a relatively new version of Hadoop with more than hadoop2.0, and it already contains a number of

, Hive, Pig. 2. Hadoop Family Learning RoadmapBelow I will introduce the installation and use of each product separately, summarize my learning route with my experience.Hadoop Hadoop Learning Roadmap Yarn Learning Roadmap Build Hadoop projects with Maven Hadoop Historical Version Installation

Generally, one machine in the cluster is specified as namenode, and another machine is specified as jobtracker. These machines areMasters. The remaining Machines serve as datanodeAlsoAs tasktracker. These machines areSlaves Official Address :(Http://hadoop.apache.org/common/docs/r0.19.2/cn/cluster_setup.html) 1 prerequisites Make sure that all required software is installed on each node of your cluster: Sun-JDK, ssh, hadoop Javatm 1.5.x mu

Chapter 2 mapreduce IntroductionAn ideal part size is usually the size of an HDFS block. The execution node of the map task and the storage node of the input data are the same node, and the hadoop performance is optimal (Data Locality optimization, avoid data transmission over the network ). Mapreduce Process summary: reads a row of data from a file, map function processing, Return key-value pairs; the system sorts the map results. If there are multi

hadoop modules. Hadoop Distributed File System (HDFS™): A distributed file system that provides high-throughput access to application data. Hadoop yarn: A Framework for Job Scheduling and cluster resource management. Hadoop mapreduce: a yarn-based system for parallel processing of large data sets. www.169it.com Lates

1. Hadoop Java APIThe main programming language for Hadoop is Java, so the Java API is the most basic external programming interface.2. Hadoop streaming1. OverviewIt is a toolkit designed to facilitate the writing of MapReduce programs for non-Java users.Hadoop streaming is a programming tool provided by Hadoop that al

/hosts command to see if the IP and host name mappings are set2.IP Setup ErrorLook at the log and find the following errorERROR org.apache.hadoop.hdfs.server.namenode.NameNode:java.net.BindException:Problembinding to zebra/192.168.1.100:9000:cannot assign requested addressThis is caused by an incorrect IP address setting, check that the IP settings of the host are consistent with the IP settings of the configuration file.Use the more/etc/hosts command

/yum.repos.d/wget Http://public-repo-1.hortonworks.com/ambari/centos7/2.x/updates/2.2.0.0/ambari.repo Install your own JDK environment Yum Localinstall jdk-8u72-linux-x64.rpm Configuring Java_home Environment variables Vim/etc/profile Export Java_home= "/usr/java/default" Installing Ambari Yum Install Ambari-server Ambari-server Setup (select your own installed JDK environment during configuration) to start the service Ambari-server start Access to se

these two modes to understandHow is hadoop's distributed parallel program written and run. This mode runs on a single machine without a distributed file system, but directly reads and writes to the file system of the local operating system.$ CD/cygdrive/C/hadoop-0.16.0 $ Mkdir test-in $ CD test-in # Create two text files in the test-In directory. The wordcount program will count the number of occurrences of each word. $ Echo "Hello World bye world">