Collaborative Research: CSR--AES: Energy Management in Real-time, Multi-tier Internet Services

摘要：该项目使用不影响性能要求的正式优化方法，为大型、多层数据中心开发能源管理技术。高性能的互联网服务通常在功能上被分解成跨越多台机器的多个半独立的层的管道。反过来，由于阶段性升级，这些系统可能由不同的几代系统组成。电力输送和冷却成本是总拥有成本的重要组成部分。这样的系统的预期工作负载是非周期性的，具有高度变化的执行需求和可能显著的I/O活动。这代表着一个重大能源节约的机会，但前提是能够保持性能保证。可伸缩性还要求本地电源管理决策必须产生全局最优能源消耗。虽然已经为更简单的体系结构设计了有效的电源管理策略，但没有直接的扩展性别歧视使其适用于多层群集，同时保留响应时间保证。结果将在领先的会议上传播，该软件也将在互联网上公开提供，供研究社区进一步研究使用，或由行业作为可能的产品开发的基础。此外，从全球社会的角度来看，成功的能源管理有助于节约自然资源，同时服务提供商成本的降低促进了经济增长和信息技术创新。最后，本研究将有助于培养研究生和本科生。

Abstract:This project develops energy management techniques for large-scale,multi-tier data-centers, using formal optimization methods that do notcompromise performance requirements. High-performance Internetservices are often functionally decomposed into a pipeline ofmultiple, semi-independent tiers spanning multiple machines. These inturn might consist of a heterogeneous mix of system generations, dueto phased upgrades. Power delivery and cooling costs constitute asignificant part of total cost of ownership.The expected workload of such a system is aperiodic, with highlyvarying execution demand and possibly significant I/O activity. Thisrepresents an opportunity for major energy savings, but only ifperformance guarantees can be maintained. Scalability also requiresthat local power management decisions must yield globally optimalenergy consumption. Although effective power management policies havebeen devised for simpler architectures, no straightforward extensionsexist to make them applicable to multi-tier clusters while preservingresponse-time guarantees.Results will be disseminated at leading conferences and the softwarewill also be publicly available on the Internet for use by theresearch community in further research, or by the industry as a basisfor possible product development. Moreover, from a global societalperspective, successful energy management helps save naturalresources, while reduced service-provider costs foster economic growthand IT innovation. Finally, this research will help train graduateand undergraduate students.