| dc.description.abstract | It is prudent to leverage on-site renewable sources like solar and wind to build environmentally
friendly and energy-efficient data centers. Data centers deploy distributed UPS
systems to handle the intermittent nature of renewable energy. As the pilot study of this dissertation
research, we propose a renewable-energy manager, REDUX, to offer a smart way of
managing server energy consumption powered by a distributed UPS system and renewable
energy. REDUX maintains a desirable balance between renewable-energy utilization and
data center performance. REDUX makes judicious use of UPS devices to allocate energy
resources when renewable energy generation is low or fluctuate condition. REDUX not only
guarantees the stable operation of daily workload but also curtails the energy cost of data
centers by improving power resource utilization.
Due to intermittent nature of renewable energy and fluctuating grid energy price, advanced
data centers often deploy distributed UPS systems with high efficiency, scalability,
and reliability. In the second part of this dissertation study, we investigate the problem of
energy management for data centers with renewable resources and energy storage. As an extension
project of REDUX system, we devise an interface-backbone layer framework designed
unified energy efficiency management system called REDUX2. Properly allocating fluctuating
renewable energy, UPS battery energy storage, and grid power with dynamic price,
REDUX2 is primed to minimize the long-term electricity bill for data centers. With prediction
of renewable energy supply, categorization of grid power price level, and energy storage
in the UPS devices, REDUX2 orchestrates workload distribution facilitated by the heuristic
algorithms that handle high-level control strategies such as renewable energy smoothing,
UPS device control, back-filling, and non-urgent job admission deferrals. Compared with
the existing solutions, REDUX2 demonstrates a prominent capability of mitigating average
peak workload and boosting renewable-energy utilization.
Leveraging on-site renewable sources like solar and wind provides ample opportunities
on developing environmentally friendly and energy-efficient data centers. Evidence demonstrates
that renewable-aware job schedulers conserve energy by adjusting the arrangement of
non-urgent workload according to renewable energy states. To further upgrade REDUX2 to
the next high level, we bring forth a unify designed energy management system - REDUX3
- equipped with a renewable-aware scheduler. REDUX3 judiciously schedules jobs submitted
by users and manages the energy supply of data centers powered by grid, renewable
energy, and distributed uninterruptible power supply (UPS) systems. REDUX3 seamlessly
incorporates a renewable-aware workload scheduler to make back-fills and defer admission s
of non-urgent jobs, thereby properly allocating fluctuating renewable energy, UPS battery
energy storage, and grid power with dynamic price. Our experimental results confirm that
REDUX3 is adroit at minimizing long-term electricity bills for data centers by boosting
renewable energy utilization. | en_US |
