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Apache Hadoop Ecosystem installation package: http://archive.apache.org/dist/Software Installation directory: ~/appjdk:jdk-7u45-linux-x64.rpmhadoop:hadoop-2.5. 1-src. Tar . Gzmaven:apache-maven-3.0. 5-bin. Zip protobuf:protobuf-2.5. 0. tar. gz1. Download Hadoopwget http://tar -zxvf hadoop-2.5. 1-src. TarThere is a BUILDING.txt file under the extracted Hadoop root
Tags: bit success tmp BASHRC Mon core [1] dpkg folderTo create a new user: $sudo useradd-m hadoop-s/bin/bashTo set the user's password:$sudo passwd HadoopTo add Administrator privileges:$sudo adduser Hadoop sudo Install SSH, configure SSH login without password:To install SSH Server: $ sudo apt-get install Openssh-serverUse SSH to log in to this machine:$ ssh localhostLaunched Shh Loc
Hadoop Learning Notes Author: wayne1017 first, a brief introduction Here is a general introduction to Hadoop.Most of this article is from the official website of Hadoop. One of them is an introduction to HDFs's PDF document, which is a comprehensive introduction to Hadoop. My this series of Hadoop learning Notes is al
below. sudo vim/etc/environment Path= "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/java/ jdk1.8.0_111/lib:/usr/java/jdk1.8.0_111 " Make configuration effective Source/etc/environment Verify that the Java environment is configured successfully Java-version Second
command ". /jdk-6u13-linux-i586.bin ", after the command is run is completed, the directory will be generated/jdk1.6.0 _ 13, this is jdk is successfully installed to the directory: /usr/program/jdk1.6.0 _ 13. 3.2.log on as the root user, execute the command "vi/etc/profile" in the command line, and add the following content to configure the environment variables (note: the/etc/profile file is very important, later Hadoop configuration will be used ).
Description: Compile hadoop program using eclipse in window and run on hadoop. the following error occurs: 11/10/28 16:05:53 info mapred. jobclient: running job: job_201110281103_000311/10/28 16:05:54 info mapred. jobclient: Map 0% reduce 0%11/10/28 16:06:05 info mapred. jobclient: task id: attempt_201110281103_0003_m_000002_0, status: FailedOrg. apache. hadoop.
Three hadoop modes:Local Mode: local simulation, without using a Distributed File SystemPseudo-distributed mode: five processes are started on one host.Fully Distributed mode: at least three nodes, JobTracker and NameNode are on the same host, secondaryNameNode is a host, DataNode and Tasktracker are a host.Test environment: CentOS2.6.32-358. el6.x86 _ 64 Jdk-7u21-linux-x64.rpm Hadoop-0.20.2-cdh3u6.tar.gz1.
Org. apache. hadoop. IPC. remoteException: Org. apache. hadoop. HDFS. server. namenode. safemodeexception: cannot delete/tmp/hadoop/mapred/system. name node is in safe mode. The ratio of reported blocks 0.7857 has not reached the threshold 0.9990. Safe mode will be turned off automatically. At org. Apache. hadoop. HDFS
-cluster ......... ......... SUCCESS [0. 111s] [INFO] Apache Hadoop Scheduler Load Simulator ...... SUCCESS [5. 307s] [INFO] Apache Hadoop Tools Dist ......... .......... SUCCESS [ +. 215s] [INFO] Apache Hadoop Tools ......... .............. SUCCESS [0. 024s] [INFO] Apache Hadoop distribution ......... ......... SUCCES
. All configuration files for hadoop will be present in the directory$ Hadoop_install/hadoop/Conf. Startup scripts The$ Hadoop_install/hadoop/binDirectory contains some scripts used to launch hadoop DFS and hadoop MAP/reduce daemons. These are: Start-all.sh-Starts all
CENTOS7 Hadoop Environment under construction Experimental Purpose: Build a Hadoop platform for 5 hosts and prepare for HBase later. Experimental steps: 0x01 Hardware conditions: 5 CENTOS7 Host, IP address: x.x.x.46~50. The names of the machines are lk,node1,node2,node3,node4 respectively.Experimental conditions by default using the root account, there is a need to cut back to the normal user situation I
is very ideal. This method is lzo. The lzo compressed file is composed of many small blocks (about 256 K), so that hadoop jobs can be split by block. In addition, lzo has taken efficiency into account during design, and its decompression speed is twice that of gzip, which allows it to save a lot of disk read/write, the compression ratio is not as good as that of gzip. The compressed files are about half the size of gzip files, but this still saves
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 the group every day. welcome to join us! Wh
problem. Execute the hadoop-examples-1.2.1.jar program, in fact, is to compile the java program into a jar file, and then run directly, you can get the results. In fact, this is also a method for running java programs in the future. Compile, package, and upload the program and run it. In addition, eclipse connects to Hadoop
host names cat> masters Slaves Cluster verification test When Hadoop is started for the first time, you need to format Hadoop HDFS and execute: [root@Master ~]# hadoop namenode -format14/05/12 01:07:43 INFO namenode.NameNode: STARTUP_MSG:/************************************************************STARTUP_MSG: Starting NameNodeS
Preface:I am currently in the development of Android, but also in an information security company. The company's main is to do in the virtual machine running products, and the cloud computing, thought is to go to the cloud computing. Self-feeling mobile internet + cloud Computing + information security will be a good direction, so plunge into it. Because it's Java origin, it's natural to choose Hadoop.Author System environment:Linux:centos Release 6.5
PrefaceI am now in the development of Android, but also in an information security company. The company's main is to do in the virtual machine running products, and the cloud computing, thought is to go to the cloud computing. Self-feeling mobile internet + cloud Computing + information security will be a very good direction, so join in.Because it's Java origin. So it's natural to choose Hadoop.Author System EnvironmentLinux:centos Release 6.5 (Final)
"; Print $value-> block_replication. "\ T". $value-> length. "\ T". $value-> Modification_time. "\ T". $value-> permission. "\ T". $value-> owner. "\ T". $value-> Group. "\ T". $value-> path. "\ n"; } $hadoop _transport-> Close (); catch (Exception $e) { Print_r ($e); } ?> Start the thrift of Hadoop Hadoop-0.20.2\src\contrib\thriftfs\scripts\start_thrift_server.s
Although the overall implementation of the automatic installation, but there are many needs to improve the place, such as:1. The code can only be run under the root authority, otherwise it will be wrong, this need to add permission to judge;2. You can also add several functions to reduce code redundancy;3. Some of the judgements are not intelligent enough;......The ability and the time are limited, can only write here.The Installhadoop file code is as follows:#!/bin/bash#root_password= "123456"
Table Default.pokesRmr:DEPRECATED:Please use ' rm-r ' instead.Deleted/user/hive/warehouse/pokesTable default.pokes Stats: [num_partitions:0, Num_files:1, num_rows:0, total_size:79, raw_data_size:0]OkTime taken:1.681 seconds $ Export Hadoop_mapred_home=/usr/lib/hadoop-mapreduce 4. Install Impala$ cd/etc/yum.repos.d/$ sudo wget http://archive.cloudera.com/impala/redhat/6/x86_64/impala/cloudera-impala.repo$ sudo yum install Impala Impala-shell$ sudo yum
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