Database Reference
In-Depth Information
development environment on Windows, see Chapter 3, “Installing
HDInsight.”)
NOTE
To complete the following activity, you need to download and install the
HDP for Windows from Hortonworks or the HDInsight Emulator from
Microsoft.
After you have installed the environment, you should see three icons on the
desktop for interacting with the Hadoop service. The NameNode maintains
the directory files in the Hadoop Distributed File System (HDFS). It also
keeps track of where the data files are kept in a Hadoop cluster. Figure 9.1
shows the information displayed when you click the NameNode icon.
Figure 9.1 Displaying the NameNode information
Additional links appear on the NameNode information page for browsing
the file system and log files and for additional node information. Figure 9.2
shows the files in the /user/Dan directory.
 
 
 
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