Configuration A: Maximum Performance Density (42 Servers, High-Voltage) - HP ProLiant DL360 Manual

hp ProLiant DL360 generation 3 server high-density deployment technical white paper
configuration A: maximum performance density
(42 servers, high-voltage)
This configuration (Figure 2) shows a "best practice" for a 42U rack with 42 servers in a
high-voltage facility where a deployment plan can accommodate the derating of each ProLiant
DL360 Generation 3 server. The "Power and Thermal Budgeting" section explains power
budgeting methods and measured power for different base-line configurations and subsystem
components. The following calculation verifies supporting 42 servers with 2 x 40 A high voltage
PDUs:
Since there are 2 PDUs supporting 42 servers, each PDU needs to support 21 servers. A 40 A
high-voltage PDU supporting 21 servers can allocate each server with maximum current of
40/21 = 1.905 A @ 208 V. Therefore, the allocated maximum input power for each server
will be:
1.905 A * 208 V = 396 W
Since the maximum measured input power per server is 352 W, 352 W will be used to calculate
the maximum thermal dissipation per server. It will be:
352 W * 3.41 = 1200 BTUs/hour
For 42 servers, the total thermal dissipation will be 1200*42 = 50,414 BTUs/hour.
In the "Measured Input Power" section of this document, a fully configured system was measured
to consume lower than 352 W (Table 3, server configuration 4). If each derated server
configuration input power is lower than 396 W, then 42 servers can be supported via this
configuration summary (Table 12).
Table 12. Configuration A Summary
Configuration A Summary
Rack Contents
Units
42 Servers with all fixed or all sliding rails with cable trays
2 High-voltage 40 A Modular PDUs
Internal Cables
42 Standard power cords going to 2 PDUs in the side panels
Cables External to Rack
42 (management) Network cables from the Integrated Lights-Out's RJ45 connector to external 48 port Ethernet
switches with 44 10/100 ports and 4 Gigabit ports
84 (data) Network cables from the on-board 10/100/1000 NICs' RJ-45 connectors to six external 24 port Gigabit
Ethernet switches, assuming use of two LAN connections per server
2 High voltage input power cords hardwired from the PDUs to facility AC power feeds
Site Utility Requirements (worst-case)
Power: 2 Dedicated 200 V - 240 V 50 A branch circuits.
Thermal: Up to 50,414 BTUs/hour [This number is a worst-case. The actual BTUs/hour will depend on the
OS/application software running and the server hardware configurations.]
Weight: Up to 2,000 lb (with sliding-rails) [The network cables are not accounted for since most implementations
route the network cables to the ceiling-hung cable rails outside of the rack.]
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