In the news about the launch of data centers, you will definitely see the mention of power in "kilowatts per rack". Over the past year, our combined team of DataLine and Rostelecom-DPC has launched 4 data centers, and each time we encountered comments in social networks and questions in chats:
Today we will answer in order: how do we calculate the power per rack, why this figure does not limit the customer, but, on the contrary, saves his resources. I will explain from the point of view of statistics and take a couple of visual analogies from the popular book " Statistics and cats " (a very cool manual for updating forgotten knowledge).
Let's imagine that we have 10 cats (and we know examples when there are 100 cats). The smallest cat eats 1 kg of feed, the middle one - 3, and the largest one - 10. We do not buy each 10, but calculate the total feed consumption for all and plan purchases from the average. The same, well, or almost the same - with racks.
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