HaaS, or Hadoop as a Service providers make the Hadoop data analytics platform much more user friendly for scientists and administrators. Available services run the gamut from simple access to Hadoop software for those who value independence, to full services for those who wish it. HaaS can store data in HDFS, manage elasticity, and support continual operations. The right application of HaaS can create great improvement in data science analysis and management.
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http://www.datacenterknowledge.com/archives/2014/05/14/understanding-hadoop-service-offerings/
