"With the announcement of its CloudStack 3 platform this week, Citrix Systems took a bold step forward in competing with Amazon in the cloud computing space, and open source cloud computing platforms are proliferating more rapidly than ever.  However, there is no question that Amazon Web Services (AWS) remains a dominant force in the cloud space, and newly released data only corroborates that fact. In fact, Amazon's dominance is making it tough for open source-focused cloud players to compete. Here are the details."

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