Hadoop version: hadoop-2.5.1-x64.tar.gz
The study referenced the Hadoop build process for the two nodes of the http://www.powerxing.com/install-hadoop-cluster/, I used VirtualBox to open four Ubuntu (version 15.10) virtual machines, build four nodes of the
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
Build a Hadoop Client-that is, access Hadoop from hosts outside the Cluster
Build a Hadoop Client-that is, access Hadoop from hosts outside the Cluster
1. Add host ing (the same as namenode ing ):
Add the last line
[Root @ localhost ~] # Su-root
[Root @ localhost ~] # Vi/etc/hosts127.0.0.1 localhost. localdomain localh
Pre-language: If crossing is a comparison like the use of off-the-shelf software, it is recommended to use the Quickhadoop, this use of the official documents can be compared to the fool-style, here do not introduce. This article is focused on deploying distributed Hadoop for yourself.1. Modify the machine name[[email protected] root]# vi/etc/sysconfig/networkhostname=*** a column to the appropriate name, the author two machines using HOSTNAME=HADOOP0
Chapter 1 Meet HadoopData is large, the transfer speed is not improved much. it's a long time to read all data from one single disk-writing is even more slow. the obvious way to reduce the time is read from multiple disk once.The first problem to solve is hardware failure. The second problem is that most analysis task need to be able to combine the data in different hardware.
Chapter 3 The Hadoop Distributed FilesystemFilesystem that manage storage h
Hadoop cannot be started properly (1)
Failed to start after executing $ bin/hadoop start-all.sh.
Exception 1
Exception in thread "Main" Java. Lang. illegalargumentexception: Invalid URI for namenode address (check fs. defaultfs): file: // has no authority.
Localhost: At org. Apache. hadoop. HDFS. server. namenode. namenode. getaddress (namenode. Java: 214)
Localh
First explain the configured environmentSystem: Ubuntu14.0.4Ide:eclipse 4.4.1Hadoop:hadoop 2.2.0For older versions of Hadoop, you can directly replicate the Hadoop installation directory/contrib/eclipse-plugin/hadoop-0.20.203.0-eclipse-plugin.jar to the Eclipse installation directory/plugins/ (and not personally verified). For HADOOP2, you need to build the jar f
Differences between centos6.5 and VMware and Oracle VM VirtualBox
I have been getting started with hadoop for some days. I have encountered many problems when I configured the hadoop preparation tool in the early stage.
Today, I have recorded one of my problems through my blog. I hope that later friends can avoid some troubles while reading this article.
First
Two cyanEmail: [Email protected] Weibo: HTTP://WEIBO.COM/XTFGGEFNow it's time to learn about Hadoop in a systematic way, although it may be a bit late, but you want to learn the hot technology, let's start with the installation environment. Official documentsThe software and version used in this article are as follows:
Ubuntu 14.10-Bit Server Edition
Hadoop2.6.0
JDK 1.7.0_71
Ssh
Rsync
First, you prepare a machine with Lin
Two cyanEmail: [Email protected] Weibo: HTTP://WEIBO.COM/XTFGGEFNow it's time to learn about Hadoop in a systematic way, although it may be a bit late, but you want to learn the hot technology, let's start with the installation environment. Official documentsThe software and version used in this article are as follows:
Ubuntu 14.10-Bit Server Edition
Hadoop2.6.0
JDK 1.7.0_71
Ssh
Rsync
First, you prepare a machine with Lin
software that the server Edition does not have.4. The desktop version is missing Apache, MySQL, and PHP, which are standard in the server edition.So, let's choose the desktop version.1.2 I386 vs AMD64On the Ubuntu website, if you download 32-bit, then the ISO file ends with I386.iso. If the download is 64-bit, then the ISO file ends with Amd64.iso.The i386 is a 32-bit processor in the x86 series.The AMD64 is a 64-bit processor. Intel has its own 64-bit, but not backwards-compatible, 64 to AMD64
Hadoop In The Big Data era (1): hadoop Installation
If you want to have a better understanding of hadoop, you must first understand how to start or stop the hadoop script. After all,Hadoop is a distributed storage and computing framework.But how to start and manage t
Introduction HDFs is not good at storing small files, because each file at least one block, each block of metadata will occupy memory in the Namenode node, if there are such a large number of small files, they will eat the Namenode node's large amount of memory. Hadoop archives can effectively handle these issues, he can archive multiple files into a file, archived into a file can also be transparent access to each file, and can be used as a mapreduce
Preface
After a while of hadoop deployment and management, write down this series of blog records.
To avoid repetitive deployment, I have written the deployment steps as a script. You only need to execute the script according to this article, and the entire environment is basically deployed. The deployment script I put in the Open Source China git repository (http://git.oschina.net/snake1361222/hadoop_scripts ).
All the deployment in this article is b
ObjectiveWhat is Hadoop?In the Encyclopedia: "Hadoop is a distributed system infrastructure developed by the Apache Foundation." Users can develop distributed programs without knowing the underlying details of the distribution. Take advantage of the power of the cluster to perform high-speed operations and storage. ”There may be some abstraction, and this problem can be re-viewed after learning the various
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
Hadoop consists of two parts:
Distributed File System (HDFS)
Distributed Computing framework mapreduce
The Distributed File System (HDFS) is mainly used for the Distributed Storage of large-scale data, while mapreduce is built on the Distributed File System to perform distributed computing on the data stored in the distributed file system.
Describes the functions of nodes in detail.
Namenode:
1. There is only one namenode in the
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