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 (Purpose: To 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