Code analysis of Hadoop v0.1.0 (1) Setting up the environment
2013-09-15 12:25
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This document is to analyze the code in Hadoop v0.1.0, which is the first version of Hadoop with around 22000 code lines. The IDE is Eclipse on the Ubuntu10.04 platform.
First, how to build the environment for the codes.
1. Open the Eclipse.
2. Click the new Java Project.
3. Builds the project from the known sources.
Other steps:
1. JDK or JRE is required.
2. Specify the JAVA_HOME in the file in .../hadoop-0.1.0/conf/hadoop-env.sh.
3. Other annoying steps...
Let us see the main structure of the source package.
As we can see, there are 8 packages. I will explain the main codes in each package from bottom to top, i.e. from the basic class to others classes using the basics.
First, how to build the environment for the codes.
1. Open the Eclipse.
2. Click the new Java Project.
3. Builds the project from the known sources.
Other steps:
1. JDK or JRE is required.
2. Specify the JAVA_HOME in the file in .../hadoop-0.1.0/conf/hadoop-env.sh.
3. Other annoying steps...
Let us see the main structure of the source package.
As we can see, there are 8 packages. I will explain the main codes in each package from bottom to top, i.e. from the basic class to others classes using the basics.
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