Install Eclipse on Linux and configure the MapReduce program development environment

We intend to install Eclipse on Linux (CentOS) and configure the MapReduce program development environment.

Step one: Download and install Eclipse (provided the JDK is already installed)

Open the browser in the Linux system and enter the URL: http://archive.eclipse.org/eclipse/downloads/We choose the 3.7.2 version.

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[email protected] downloads]$ LL

Total 178052

-rw-rw-r--. 1 Liuqingjie Liuqingjie 182321299 may 05:16 eclipse-sdk-3.7.2-linux-gtk.tar.gz

Copy to home directory and unzip

[email protected] downloads]$ CP eclipse-sdk-3.7.2-linux-gtk.tar.gz/home/liuqingjie/

[Email protected] ~]$ TAR-ZXVF eclipse-sdk-3.7.2-linux-gtk.tar.gz

Start Eclipse (provided you enter the graphical interface):

[[Email protected] ~]$ CD eclipse

[Email protected] eclipse]$./eclipse

Step Two: Configure the MapReduce program development environment

1. Copy the Hadoop-0.20.2-eclipse-plugin.jar ( under the Hadoop-0.20.2/contrib/eclipse-plugin directory) to the Eclipse/plugins directory, and restart Eclipse.

2. Configure the Hadoop installation directory (you can automatically import all the jar packages from the Hadoop root and the Lib directory in the new project)

Window->preference

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2. Open the MapReduce view

window->open perspective->other, select Map/reduce, Icon is blue Elephant:650) this.width=650; "src="/HTTP/ Pic002.cnblogs.com/images/2011/354747/2011112617253029.jpg "style=" Font-family:verdana, Arial, Helvetica, sans-serif;font-size:14px;line-height:25.2000007629395px;text-indent:2em;border:0px; "/>

3. Add a MapReduce environment

At the lower end of eclipse, there will be a tab next to the console, called "Map/reduce Locations", right-click in the blanks below, select "New Hadoop location ...",:

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In the dialog box that pops up, fill in the following:

Location name (pick a name)
Map/reduce Master (the IP and port of the Job tracker, according to the mapred.job.tracker configured in Mapred-site.xml)
DFS Master (Name node IP and port, based on fs.default.name configured in Core-site.xml)

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4. Use Eclipse to modify HDFS content

After the previous step, the left "Project Explorer" should appear in the configuration of HDFs, right-click, you can create new folders, delete folders, upload files, download files, delete files and other operations.

Note: The changes cannot be displayed immediately after each operation in eclipse and must be refreshed.

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Install Eclipse on Linux and configure the MapReduce program development environment