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Enterprise Data Center Design and Methodology by Rob Snevely

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Using RLUs to Determine In-Feed Capacities

In-feed capacities are the grand totals of the power, cooling, physical space, weight, and bandwidth you will need to support a given number of racks. Let's say you plan to build a data center with 40 Sun Fire 6800 servers (RLU-C). Each Sun Fire 6800 server will have four Sun StorEdge racks (RLU Superset-A) connected to it. That's 40 RLU-Cs and 160 RLU Superset-As.

The following table shows the total floor load support and in-feed requirements for these RLUs.

Table 4-3. Total In-Feeds for Racks
Specifications 40 RLU-C Racks 160 RLU Superset-A Racks Totals
Weight 40,000 lbs (18,144 kg) 155,200 lbs (70,398 kg) 195,200 lbs (88,542 kg)
Power 160 30Amp 208V L6-30R outlets

RM=2

339,506 W × RM = 679,012 W

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