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Re:AWS Management Console - Auto Scaling Support by e1g on Friday December 13, 2013 @01:20AM (#6899345)
The new C3.Large is cheaper than M1.Large (and only marginally more expensive than the old M1.Medium), but its CPU performance is roughly twice as good. Swapping over made a notable difference for our web nodes (perhaps 30-40% reduction in server time for the web-facing tier).

C3's instance-level SSD drives are a very nice touch as well.

Re:AWS Management Console - Auto Scaling Support by ceejayoz on Friday December 13, 2013 @08:07AM (#6900289)
It should be noted, though, that the c3.large has half the RAM of the m1.large.