From the post:
This blog shows you how to run Mahout in the cloud, using Apache Whirr. Apache Whirr is a promising Apache incubator project for quickly launching cloud instances, from Hadoop to Cassandra, Hbase, Zookeeper and so on. I will show you how to setup a Hadoop cluster and run Mahout jobs both via the command line and Whirr’s Java API (version 0.4).
Running Mahout in the cloud with Apache Whirr will prepare you for using Whirr or similar tools to run services in the cloud.