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Office and home environments are increasingly crowded with personal computers. Even though these computers see little use in the course of the day, they often remain powered, even when idle. Leaving idle PCs running is not only wasteful, but with rising energy costs it is increasingly more expensive. Authors propose partial migration of idle desktop sessions into the cloud to achieve energy proportional computing. Partial migration only propagates the small footprint of state that will be needed during idle period execution, and returns the session to the PC when it is no longer idle. Authors show that this approach can reduce energy usage of an idle desktop by up to 50% over an hour and by up to 69% overnight.
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