[CLOUD SHOWDOWN: Amazon vs. Rackspace (OpenStack) vs. Microsoft vs. Google]
Joyent and SkyTap are not alone in offering cloud-based Hadoop products. Amazon Web Services, who many see as a market leader in public infrastructure as a service (Iaas) has Elastic Map Reduce (EMR), which uses a Hadoop framework based on its Elastic Compute Cloud (EC2) and Simple Storage Services (S3) to host a Hadoop framework. AWS has high-storage virtual machine instance types for customers to use EMR with, including one with 48TB of storage and 117GB of RAM across 16 virtual cores. AWS partners with MapR and HBase on its offering.
A variety of other providers are in the early stages of rolling out their cloud-based Hadoop products. Microsoft, for example, has HDInsight in preview, which runs on either Windows or in Microsoft's Azure cloud and can be managed via Windows Systems Center 2012.
Rackspace and HortonWorks announced last fall that the two companies would jointly-develop an OpenStack-powered offering for public and private clouds, but no official products have been announced. Google and MapR have worked together but don't have a product offering, while VMware is working on virtualizing Hadoop clusters with its Project Serengeti work.