Netflix' data warehouse is based on Hadoop

I'm listening to Rüdiger from Microsoft. He explains what can be provided by Azure, HDInsight, a Big Data platform based on Hadoop.

This brings me to a blog entry I wanted to write for a while.

There are a couple of interesting articles on the Netflix blog about their use of Hadoop for their data scientists for analysis, and as a data warehouse platform:

• The Netflix Tech Blog: Genie 2.0: Second Wish Granted!
• The Netflix Tech Blog: Using Presto in our Big Data Platform on AWS
• The Netflix Tech Blog: Hadoop Platform as a Service in the Cloud

As you can see, they don't use relational databases as a backend for their data warehouse.

Would a Hadoop platform be a simple, cost effective data warehouse option?