Analogous to the real estate market, every inch is also precious within a data center. IT space is in short supply. Therefore, every data center operator strives to accommodate as much performance as possible in as little space as possible. Every additional height unit (HU) that a top-of-rack switch, for example, takes up is missing from the servers below it, thus reducing the maximum computing power of a rack. High density concepts that make better use of the available space are profitable here.
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