I have setup a cluster using Ambari that includes 3 nodes .
Now I want to access a file in a HDFS using my client application.
I can find all node URIs under Data Nodes in Amabari.
What is the URI + Port I need to use to access a file ? I have used the default installation process.
Default port is "8020".
You can access the "hdfs" paths in 3 different ways.
Simply use "/" as the root path
For e.g.
E:\HadoopTests\target>hadoop fs -ls /
Found 6 items
drwxrwxrwt - hadoop hdfs 0 2015-08-17 18:43 /app-logs
drwxr-xr-x - mballur hdfs 0 2015-11-24 15:36 /tmp
drwxrwxr-x - mballur hdfs 0 2015-10-20 15:27 /user
Use "hdfs:///"
For e.g.
E:\HadoopTests\target>hadoop fs -ls hdfs:///
Found 6 items
drwxrwxrwt - hadoop hdfs 0 2015-08-17 18:43 hdfs:///app-logs
drwxr-xr-x - mballur hdfs 0 2015-11-24 15:36 hdfs:///tmp
drwxrwxr-x - mballur hdfs 0 2015-10-20 15:27 hdfs:///user
Use "hdfs://{NameNodeHost}:8020/"
For e.g.
E:\HadoopTests\target>hadoop fs -ls hdfs://MBALLUR:8020/
Found 6 items
drwxrwxrwt - hadoop hdfs 0 2015-08-17 18:43 hdfs://MBALLUR:8020/app-logs
drwxr-xr-x - mballur hdfs 0 2015-11-24 15:36 hdfs://MBALLUR:8020/tmp
drwxrwxr-x - mballur hdfs 0 2015-10-20 15:27 hdfs://MBALLUR:8020/user
In this case, "MBALLUR" is the name of my Name Node host.