Is it possible to run Hadoop in Pseudo-Distributed operation without HDFS?

Question

I\'m exploring the options for running a hadoop application on a local system.

As with many applications the first few releases should be able to run on a single nod

Answer 1

Yes, this is possible, although I'm using 0.19.2. I'm not too familiar with 0.18.3, but I'm pretty sure it shouldn't make a difference.

Just make sure that fs.default.name is set to the default (which is file:///), and mapred.job.tracker is set to point to where your jobtracker is hosted. Then start up your daemons using bin/start-mapred.sh . You don't need to start up the namenode or datanodes. At this point you should be able to run your map/reduce jobs using bin/hadoop jar ...

We've used this configuration to run Hadoop over a small cluster of machines using a Netapp appliance mounted over NFS.