Sun Microsystems T5120, T5220 manual Space, Watts, and Performance Introducing the SWaP Metric

10

Feature

Ethernet

The Evolution of Chip Multithreading (CMT) Sun Microsystems, Inc.

Sun SPARC Enterprise T5120	Sun SPARC Enterprise T5220
Server	Server
Four on-board Gigabit Ethernet	Four on-board Gigabit Ethernet
ports (10/100/1000)	ports (10/100/1000)
Two 10 Gb Ethernet ports via	Two 10 Gb Ethernet ports via
XAUI combo slots	XAUI combo slots

Power supplies	Two hot-swappable AC 650W or	Two hot-swappable AC 750W
	DC 660W power supply units	power supply units
	(N+1 redundancy)	(N+1 redundancy)
Fans	Four hot-swappable fan trays,	3 hot-swappable fan trays, with
	with 2 fans per tray,	2 fans per tray, N+1 redundancy
	N+1 redundancy
Form factor	1 rack unit (1U)	2 rack units (2U)

a.Optional XAUI adapter cards required for access to dual 10 Gb Ethernet ports on the UltraSPARC T2 processor

Space, Watts, and Performance: Introducing the SWaP Metric

Sun SPARC Enterprise T5120 and T5220 servers deliver leading performance across a range of multithreaded workloads and benchmarks. However, with energy and real estate costs and pressures, it is not enough to measure performance in isolation.

Delivering the required level of throughput in a fixed space and power envelope is critical. Traditional system-to-system benchmarks are valuable as a way of comparing one system to another, but are limited when it comes to understanding the power and density attributes of the systems being compared. For this reason, Sun has developed the SWaP metric, standing for Space, Watts, and Performance. Designed to provide a simple and transparent measure of overall server efficiency, SWaP is calculated using the following formula:

SWaP = Performance / (Space * Power Consumption) where,

•Performance is measured by industry-standard audited benchmarks such as those sponsored by the Systems Performance Evaluation Corporation (SPEC)

•Space refers to the height of the server in rack units (RUs)

•Power is measured by watts used by the system, taken during actual benchmark runs or from vendor’s site planning guides

For the latest SWaP results for a variety of benchmarks, please see sun.com/servers/ coolthreads/benchmarks.