Key metrics for energy monitoring
PUE: Power Usage Effectiveness, ideal close to 1.0. DCiE: Data Center Infrastructure Efficiency, the reciprocal of PUE. IT load power: electricity actually used for compute. Cooling power: electricity consumed by the cooling system.
Strategies to reduce energy
Raise temperature set points: increase intake temperature within safe limits. Hot/cold aisle containment: prevent hot and cold air from mixing. Dynamic cooling adjustment: scale cooling to load. Server consolidation: retire inefficient legacy gear. Key advantages: lower operating cost, smaller carbon footprint, compliance, higher energy efficiency.