Following the moon

We’ve been having fun today calculating how to move jobs around in the day and night based on local temperatures. We heart playing with graphs.

For example, AWS Sao Paulo has a very green local energy grid so is generally a good choice, but it’s hot (27c daytime max this time of year), so the server cooling cancels out a lot of the environmental benefits. Oregon is looking pretty good so far, though: 9c daytime max in February and an okayish local grid, so even though it’s got a not-as-green power supply, it’s often a better choice than Brazil.

Just based on Amazon and Rackspace locations so far, I reckon you can save about 90% of potential emissions in winter and 95% in summer by picking the best location.

The time zone calculations are going to be a bit of a mare, though.

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