This article mainly analyzes important hadoop configuration files.
Wang Jialin's complete release directory of "cloud computing distributed Big Data hadoop hands-on path"
Cloud computing distributed Big Data practical technology hadoop exchange group: 312494188 Cloud computing practices will be released in th
install mysql-server, installing and then installing a similar client-side platform like MySQL Workbench, to make it easy for you to visualize the operation of MySQLHadoop Installation and ConfigurationDownload hadoop1.2.1 tar.gz package, unzip the folder renamed to Hadoop, copy one to/usr/local/below, if your current account does not operate the local folder, remember to use other authorized account to operate,It is best to build a
Hadoop-2.5.2 cluster installation configuration details, hadoop configuration file details
Reprinted please indicate the source: http://blog.csdn.net/tang9140/article/details/42869531
I recently learned how to install hadoop. The steps below are described in detailI. Enviro
As a matter of fact, you can easily configure the distributed framework runtime environment by referring to the hadoop official documentation. However, you can write a little more here, and pay attention to some details, in fact, these details will be explored for a long time. Hadoop can run on a single machine, or you can configure a cluster to run on a single machine. To run on a single machine, you only
01_note_hadoop introduction of source and system; Hadoop cluster; CDH FamilyUnzip Tar Package Installation JDK and environment variable configurationTAR-XZVF jdkxxx.tar.gz to/usr/app/(custom app to store the app after installation)Java-version View current system Java version and environmentRpm-qa | grep Java View installation packages and dependenciesYum-y remove xxxx (remove grep out of each package)Configure the environment variable/etc/profile, an
VirtualBox build Pseudo-distributed mode: Hadoop Download and configurationAs a result of personal machine slightly slag, unable to deploy Xwindow environment, direct use of the shell to operate, want to use the mouse to click the operation of the left do not send ~1.hadoop Download and decompressionhttp://mirror.bit.edu.cn/apache/hadoop/common/stable2/
when selecting the machine, i.e.,Most likely, when writing data, Hadoop writes the first piece of data Block1 to Rack1, and then randomly chooses to write Block2 to Rack2.At this time, two rack between the data transmission flow, and then, in the case of random, and then Block3 re-write back to the Rack1,At this point, a data flow is generated between the two rack.When the amount of data being processed by the job is very large, or the amount of data
: $CLASSPATHExport path= $JAVA _home/bin: $JRE _home/bin: $PATHAfter the configuration is complete, the effect is:650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M02/7F/55/wKiom1caCGHyJd5fAAAf48Z-JKQ416.png "title=" 7.png " alt= "Wkiom1cacghyjd5faaaf48z-jkq416.png"/>3. No password login between nodesSSH settings require different operations on the cluster, such as start-up, stop, and distributed daemon shell operations. Authenticating different
, install Hadoop1, download Hadoop to the server,archive.apache.org/dist/hadoop/common/hadoop-1.0.4/In fact, download to the home download that folder, you need to move to//, and then you can do the next decompression2. DecompressionTAR-XVF Hadoop-1.0.4.tar3. Configure Hadoophere is a description: A lot of installation
Preface:The configuration of a Hadoop cluster is a fully distributed Hadoop configuration.the author's environment:Linux:centos 6.6 (Final) x64Jdk:java Version "1.7.0_75"OpenJDK Runtime Environment (rhel-2.5.4.0.el6_6-x86_64 u75-b13)OpenJDK 64-bit Server VM (build 24.75-b04, Mixed mode)SSH:OPENSSH_5.3P1, OpenSSL 1.0.1e-fips 2013hadoop:hadoop-1.2.1steps:Note: the
Install EclipseDownload eclipse (click to download) to unzip the installation. I installed it under the/usr/local/software/directory.
Installing the Hadoop plugin on eclipseDownload the Hadoop plugin (click to download) and put the plugin in the Eclipse/plugins directory.
Restart Eclipse, configure Hadoop installation directoryIf installing the plugin succeed
First, compile the Hadoop pluginFirst you need to compile the Hadoop plugin: Hadoop-eclipse-plugin-2.6.0.jar Before you can install it. Third-party compilation tutorial: Https://github.com/winghc/hadoop2x-eclipse-pluginIi. placing plugins and restarting eclipsePut the compiled plugin Hadoop-eclipse-plugin-2.6.0.jar int
the method in the instructor's video to gather all the public keys and spread them to each server. You can achieve login without a password.
Note! In authorized_keyAfter placing it in the specified location, do not manually SSHLast time to all nodes!
For example, for example, if you want to manually SSH to all other nodes by entering the command SSH
Otherwise, when you start a daemon on another node, a prompt such as unable to connect to the corresponding node or start is displayed.
In this
Briefly describe these systems:Hbase–key/value Distributed DatabaseA collaborative system for zookeeper– support distributed applicationsHive–sql resolution Engineflume– Distributed log-collection system
First, the relevant environmental description:S1:Hadoop-masterNamenode,jobtracker;Secondarynamenode;Datanode,tasktracker
S2:Hadoop-node-1Datanode,tasktracker;
S3:Had
I. Hadoop-eclipse-plugin-2.7.3.jar plugin download Click to download the plugin into the installation directory of Eclipse DropinsThird, the configuration on eclipse3.1 Opening Window-->persperctive-->other3.2 Select Map\/reduce, click OK3.3 Click the image icon to add a cluster3.4 The Hadoop cluster configuration para
Hadoop User Experience (HUE) Installation and HUE configuration Hadoop
HUE: Hadoop User Experience. Hue is a graphical User interface for operating and developing Hadoop applications. The Hue program is integrated into a desktop-like environment and released as a web program
WordCount code in Hadoop-loading Hadoop configuration files directlyIn MyEclipse, write the WordCount code directly, calling the Core-site.xml,hdfs-site.xml,mapred-site.xml configuration file directly in the codePackagecom.apache.hadoop.function;importjava.io.ioexception;importjava.util.iterator;import java.util.String
on Master$CD/home/hadoop/.ssh$cat id_rsa.pub >> authorized_keys_s1 Add a local key authorized_keys_s1$ authorized_keys_s2 >> authorized_keys_s1$CP authorized_keys_s1 Authorized_keys$RM –RF authorized_keys_s1 Authorized_keys_s21.5 Login with root, install JDK (on master, Slave1 and Slave2)#yum Install Java-1.6.0-openjdk-develThis installation, Java executable files are automatically added to the/usr/bin/directory.Verify the shell command: java-version
Hadoop pseudo-distributed mode configuration and installation
Hadoop pseudo-distributed mode configuration and installation
The basic installation of hadoop has been introduced in the previous hadoop standalone mode. This section
variable.Note: If the file you downloaded is in RPM format, you can install it by using the following command:RPM-IVH jdk-7u72-linux-x64.rpm4.5. environment variable settings Modify the. Profile file (this is recommended so that other programs can also use the JDK in a friendly way)# Vi/etc/profileLocate the export PATH USER LOGNAME MAIL HOSTNAME histsize INPUTRC in the file, and change to the following form:Export java_home=/opt/java/jdk1.7.0_72Export path= $PATH: $JAVA _home/bin: $JAVA _home/
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