Compaq ProLiant DL360 Ultra-Dense Server Deployment in Compaq Racks

Compaq ProLiant DL360 Ultra-Dense Server Deployment in Compaq Racks 31
128H-1100B-WWEN
3.1 Configuration-A: 42 De-rated Servers, High
Voltage
This configuration shows a “best practice” for a 42U rack with 42 servers in a high voltage
facility (North America only) where a deployment plan can accommodate the de-rating of each
ProLiant DL360 server. Section 2.2 explains power budgeting methods and measured power for
different base-line configurations and subsystem components. The following calculation verifies
supporting 42 servers with 24A High Voltage PDUs:
Since there are 2 PDUs to support 42 servers, each PDU needs to support 21 servers. A 24A High
Voltage PDU supporting 21 servers can allocate each server with maximum current of (24/21=)
1.143A @ 208V. Therefore, the allocated maximum input power for each server will be
1.143A * 208V = 238W
The maximum thermal dissipation per server will be
238W * 3.41 = 812 BTUs/hour
For 42 servers, the total thermal dissipation will be (812*42=) 34,104 BTUs/hour.
In Section 2.2, a fully configured system was measured to consume lower than 200W (Table 2-3,
Server Configuration-5). Hence, if each de-rated server configuration input power is lower than
238W then 42 servers can be supported via this configuration summary.
BEST PRACTICE