hadoop ranger

1. What is a distributed file system? A file system stored across multiple computers in a management network is called a distributed file system. 2. Why do we need a distributed file system? The reason is simple. When the data set size exceeds the storage capacity of an independent physical computer, it is necessary to partition it and store it on several independent computers. 3. distributed systems are more complex than traditional file systems Because the Distributed File System arc

Hadoop uses Eclipse in Windows 7 to build a Hadoop Development Environment Some of the websites use Eclipse in Linux to develop Hadoop applications. However, most Java programmers are not so familiar with Linux systems. Therefore, they need to develop Hadoop programs in Windows, it summarizes how to use Eclipse in Wind

Although I have installed a Cloudera CDH cluster (see http://www.cnblogs.com/pojishou/p/6267616.html for a tutorial), I ate too much memory and the given component version is not optional. If only to study the technology, and is a single machine, the memory is small, or it is recommended to install Apache native cluster to play, production is naturally cloudera cluster, unless there is a very powerful operation.I have 3 virtual machine nodes this time. Each gave 4G, if the host memory 8G, can ma

[Linux] [Hadoop] Run hadoop and linuxhadoop The preceding installation process is to be supplemented. After hadoop installation is complete, run the relevant commands to run hadoop. Run the following command to start all services: hadoop@ubuntu:/usr/local/gz/

Hadoop Introduction Hadoop is a software framework that can process large amounts of data in a distributed manner. Its basic components include the HDFS Distributed File System and the mapreduce programming model that can run on the HDFS file system, as well as a series of upper-layer applications developed based on HDFS and mapreduce. HDFS is a distributed file system that stores large files in a network i

The previous installation process to be supplemented, after the installation complete Hadoop installation, began to execute the relevant commands, let Hadoop run up Use the command to start all services: [Email protected]:/usr/local/gz/hadoop-2.4. 1$./sbin/start-all. SHOf course there will be a lot of startup files under directory

Environment and objectives: -System: VMWare/Ubuntu 12.04 -Hadoop version: 0.20.2 -My node configuration (Fully Distributed cluster) Master (job tracker) 192.168.221.130 H1 Slave (Task tracker/data node) 192.168.221.141 H2 Slave (Task tracker/data node) 192.168.221.142 H3 -User: Hadoop_admin -Target: Hadoop, http: // localhost: 50

Why is the eclipse plug-in for compiling Hadoop1.x. x so cumbersome? In my personal understanding, ant was originally designed to build a localization tool, and the dependency between resources for compiling hadoop plug-ins exceeds this goal. As a result, we need to manually modify the configuration when compiling with ant. Naturally, you need to set environment variables, set classpath, add dependencies, set the main function, javac, and jar configur

1. hadoop version Introduction Configuration files earlier than version 0.20.2 (excluding this version) are in default. xml. Versions later than 0.20.x do not include jar packages with Eclipse plug-ins. Because eclipse versions are different, you need to compile the source code to generate the corresponding plug-ins. 0.20.2 -- 0.22.x configuration files are concentrated inConf/core-site.xml,Conf/hdfs-site.xmlAndConf/mapred-site.xml.. In versi

This is even a boring time to track part of Kingsoft Ranger's code, and write the complete code according to the program process with the compilation. Let's be a trainer! 0041ec32/. 55 push EBP; Use EBP to read the stack and find external parameters.

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

Detailed description of hadoop operating principles and hadoop principles Introduction HDFS (Hadoop Distributed File System) Hadoop Distributed File System. It is based on a paper published by google. The paper is a GFS (Google File System) Google File System (Chinese and English ). HDFS has many features: ① Multiple c

Previously introduced me in Ubuntu under the combination of virtual machine Centos6.4 build hadoop2.7.2 cluster, in order to do mapreduce development, to use eclipse, and need the corresponding Hadoop plug-in Hadoop-eclipse-plugin-2.7.2.jar, first of all, before the hadoop1.x in the official Hadoop installation package is self-contained Eclipse plug-in, Now with

Basic software and hardware configuration: X86 desktop, window7 64-bit system vb Virtual Machine (x86 desktop at least 4G memory, in order to open 3 virtual machines) centos6.4 operating system hadoop-1.1.2.tar.gz Jdk-6u24-linux-i586.bin 1. configuration under root A) modify the Host Name: vi/etc/sysconfig/network Master, slave1, slave2 B) Resolution Ip Address: vi/etc/hosts 192.168.8.100 master 192.168.8.101 slave1

1. Introduction to Hadoop versionConfiguration files that were previously in the 0.20.2 version (without this version) are in Default.xml.The 0.20.x version does not contain the Eclipse plug-in jar package, because the eclipse version is different, so you need to compile the source code to generate the corresponding plug-in.The 0.20.2--0.22.x version of the configuration file is centralized in conf/core-site.xml, conf/hdfs-site.xml , and conf/mapred-s

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

1. Create a userAddUser HDUserTo modify HDUser user rights:sudo vim/ect/sudoers, add HDUser all= (All:all) all in the file.　　2. Install SSH and set up no password login1) sudo apt-get install Openssh-server2) Start service: SUDO/ETC/INIT.D/SSH start3) Check that the service is started correctly: Ps-e | grep ssh　　4) Set password-free login, generate private key and public keySsh-keygen-t rsa-p ""Cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys　　5) Password-free login: ssh localhost6) Exit3. Config

The first 2 blog test of Hadoop code when the use of this jar, then it is necessary to analyze the source code. It is necessary to write a wordcount before analyzing the source code as follows Package mytest; Import java.io.IOException; Import Java.util.StringTokenizer; Import org.apache.hadoop.conf.Configuration; Import Org.apache.hadoop.fs.Path; Import org.apache.hadoop.io.IntWritable; Import Org.apache.hadoop.io.Text; Import Org.apache.hadoop.map

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/

Inkfish original, do not reprint commercial nature, reproduced please indicate the source (http://blog.csdn.net/inkfish). Hadoop is an open source cloud computing platform project under the Apache Foundation. Currently the latest version is Hadoop 0.20.1. The following is a blueprint for Hadoop 0.20.1, which describes how to install