Running and Verification

Installing Ambari and Hadoop

Deploy Ambari and then on it, install the hadoop-hdfs-3.2.2-1.el7.aarch64.rpm package that you have rebuilt in Rebuilding the Software Package. (Installing Hadoop requires dependency packages. Rebuild the x86 RPM package in a similar procedure.)

For details about how to deploy Ambari, see Ambari Installation Guide.

Figure 1 shows the physical networking.

Figure 1 Physical networking diagram

DFSIO Write Test

1. Log in to the server node and perform a DFSIO write test.
   Write test command:

   sudo -u hdfs hadoop jar /usr/hdp/2.6.3.0-235/hadoop-mapreduce/hadoop-mapreduce-client-jobclient-2.7.3.2.6.3.0-235-tests.jar TestDFSIO -write -nrFiles 20 -size 1024 -resFile /tmp/TestDFSIOresults.txt

2. Check the write result. Figure 2 shows a successful write and the DFSIO write test is successful.
   Figure 2 Successful write
   

DFSIO Read Test

1. Log in to the server node and perform a DFSIO read test.

   Read test command:

   sudo -u hdfs hadoop jar /usr/hdp/2.6.3.0-235/hadoop-mapreduce/hadoop-mapreduce-client-jobclient-2.7.3.2.6.3.0-235-tests.jar TestDFSIO -read -nrFiles 20 -size 1024 -resFile /tmp/TestDFSIOresults.txt

2. Check the read result. Figure 3 shows a successful read and the DFSIO read test is successful.
   Figure 3 Successful read