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Imbalance of CPU temperatures in a blade system and its impact for power consumption of fans
2011
Cluster Computing
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In these measurements we found that there was a significant imbalance of CPU temperatures that caused an imbalance in the power consumption of fans. ...
We reduced fan power consumption by a maximum of 62 % and total power consumption by a maximum of 12 % by changing the scheduling of five nodes, changing the nodes used from hot nodes to cool nodes. ...
Acknowledgment This research was partially supported by a New Energy and Industrial Technology Development Organization (NEDO) research project entitled "research and development project for green network ...
doi:10.1007/s10586-011-0174-7
fatcat:sb6eamoeqradrlcf5e4bcjktq4
VMAP: Proactive thermal-aware virtual machine allocation in HPC cloud datacenters
2012
2012 19th International Conference on High Performance Computing
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The novel concept of heat imbalance, which captures the unevenness in heat generation and extraction, at different regions inside a HPC cloud datacenter is introduced. ...
This thermal awareness enables proactive datacenter management through prediction of future temperature trends as opposed to the state-of-the-art reactive management based on current temperature measurements ...
Jose Fortes and Renato Figueiredo of the University of Florida for their help with the multi-site experiments. ...
doi:10.1109/hipc.2012.6507478
dblp:conf/hipc/LeeVP12
fatcat:kzmw5ta3avb3fco2uier7txyee
Analysis of airflow imbalances in an open compute high density storage data center
2016
Applied Thermal Engineering
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It is found that downstream HDDs are most prone to overheating and loss in utilization during an airflow imbalance. This was proven to undermine the storage capacity of the hard disk drives. ...
In the second part, a computational fluid dynamics model is created for a high density open rack based on the active flow curve method. ...
Madhusudan Iyengar from Google Inc. for his insightful suggestions during the inception of this project. This work is supported by NSF I/UCRC Award No. IIP-1134867 and MRI Award No. CNS1040666. ...
doi:10.1016/j.applthermaleng.2016.07.186
fatcat:7acf5gs5nzasrf3p62oqkcj2uu
Thermal Faults Modeling Using a RC Model with an Application to Web Farms
2007
Real-Time Systems (ECRTS), Proceedings of the Euromicro Workshop on
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In this paper, we first develop and validate a system-wide thermal model that can account for various thermal fault types such as failure of a CPU fan, faults in the case fan and air-conditioning malfunctions ...
Today's CPUs consume a significant amount of power and generate a high amount of heat, requiring an active cooling system to support reliable operations. ...
Acknowledgment: This work has been partially funded by NSF/ITR grant; Grant Number: 0325353. ...
doi:10.1109/ecrts.2007.36
dblp:conf/ecrts/FerreiraMO07
fatcat:psy7hzofznf67px2eqmlhatmpm
GentleCool: Cooling aware proactive workload scheduling in multi-machine systems
2010
2010 Design, Automation & Test in Europe Conference & Exhibition (DATE 2010)
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In state of the art systems, workload scheduling and server fan speed operate independently leading to cooling inefficiencies. ...
The experimental results show our approach delivers average cooling energy savings of 72% and improves the mean time between failures (MTBF) of the fans by 2.3X compared to the state of the art. ...
Acknowledgements This work has been funded by NSF Project GreenLight grant 0821155, NSF SHF grant 0916127, MuSyC, UC Micro grant 08-039, Sun Microsystems, and Cisco. ...
doi:10.1109/date.2010.5457191
dblp:conf/date/AyoubSR10
fatcat:jccrpqh4kbeg3bryomu344b774
Temperature Aware Dynamic Workload Scheduling in Multisocket CPU Servers
2011
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
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In this paper, we propose a multitier approach for significantly lowering the cooling costs associated with fan subsystems without compromising the system performance. ...
Our technique manages the fan speed by intelligently allocating the workload at the core level as well as at the CPU socket level. ...
Such imbalance in fan speed is the source of energy inefficiency due to the cubic relation between fan power and its speed. ...
doi:10.1109/tcad.2011.2153852
fatcat:xelp5k7vkbeunhvah2meu6jype
Self-organizing sensing infrastructure for autonomic management of green datacenters
2011
IEEE Network
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Novel communication and coordination schemes that enable self-organization of a network of external heterogeneous sensors (e.g., thermal cameras, scalar temperature and humidity sensors, airflow meters ...
The scale and complexity of modern datacenters are growing at an alarming rate due to the rising popularity of the cloud computing paradigm as an effective means to cater to the ever increasing demand ...
Conversely, a large positive heat imbalance in a particular region will lead to a significant temperature rise, which may increase the risk of equipment overheating and hence the chances of server system ...
doi:10.1109/mnet.2011.5958006
fatcat:xtpppjhtmzevvid36zgzx3yxdi
PASSIVE TWO-PHASE THERMOSYPHON LOOP COOLING SYSTEM FOR HIGH-HEAT-FLUX SERVERS
2015
Interfacial Phenomena and Heat Transfer
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For the conditions simulated, in terms of CHF, the 10-cm-high thermosyphon was the most advantageous system design with a minimum safety factor of 1.6 relative to the imposed heat flux of 80 Wcm −2 . ...
The main aim of the current paper is to demonstrate the capability of a two-phase closed thermosyphon loop system to cool down a contemporary datacenter rack, passively cooling the entire rack, including ...
ACKNOWLEDGMENTS This study is a part of the Nano-Tera RTD project TRANSCEND, financed by the Swiss Confederation and scientifically evaluated by SNSF, which is gratefully acknowledged for one year of postdoctoral ...
doi:10.1615/interfacphenomheattransfer.2016015637
fatcat:oer6qpwnv5e57mxj2fvtvu7n7q
Energy-Efficient Thermal-Aware Autonomic Management of Virtualized HPC Cloud Infrastructure
2012
Journal of Grid Computing
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Virtual Machine (VM) migration is one of the ...
Virtualized datacenters and clouds are being increasingly considered for traditional High-Performance Computing (HPC) workloads that have typically targeted Grids and conventional HPC platforms. ...
The reduction in temperature and power is higher when the VMs are pinned to fewer CPUs. ...
doi:10.1007/s10723-012-9219-2
fatcat:zxxyef4dwzftjeaaqs2r5feb6u
Solution methods for the balancing of jet turbines
1997
Computers & Operations Research
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Because of manufacturing inaccuracies, variations occur in the weights of the blades that can, in turn, lead to significant out-of-balance forces on the engine. ...
This problem is formulated as a variation of the quadratic assignment problem and a number of solution schemes are investigated. ...
Acknowledgements The authors would like to acknowledge the contribution made by Glenn Carter in conducting the initial numerical experiments.
About the Authors ...
doi:10.1016/s0305-0548(96)00047-0
fatcat:dq4j67jfyjhk3fum5m526b4ogq
Willow: A Control System for Energy and Thermal Adaptive Computing
2011
2011 IEEE International Parallel & Distributed Processing Symposium
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In this paper we propose a hierarchical control scheme to adapt assignments of tasks to servers in a way that can cope with the varying energy limitations and still provide necessary QoS . ...
The increasing energy demand coupled with emerging sustainability concerns requires a re-examination of power/thermal issues in data centers from the perspective of short term energy deficiencies. ...
estimations leads to a pingpong control This is highly undesirable considering the overheads involved. 3) Imbalance: The migration scheme should not leave a few servers in the power deficient state while ...
doi:10.1109/ipdps.2011.14
dblp:conf/ipps/KantMD11
fatcat:suj3ydir6vgdxgrvajpmlq42wu
Towards a Systematic Survey for Carbon Neutral Data Centers
[article]
2022
arXiv
pre-print
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We begin by presenting the carbon footprint of data centers, as well as some insights into the major sources of carbon emissions. ...
In what follows, we introduce the carbon market as a policy instrument to explain how to offset data center carbon emissions in a cost-efficient manner. ...
In [158] , Wang et al. investigated optimal fan speed control for a blade server. In their framework, the power consumption of a fan is modeled as a cubic function with respect to fan speed. ...
arXiv:2110.09284v3
fatcat:gwlgrioigbedzauyeaopdlxngu
A Numerical Study on Aircraft Noise Mitigation Using Porous Stator Concepts
2022
Aerospace (Basel)
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The improved leading-edge treatment achieves a total of 1.5 dB in sound power level reduction while the thrust penalty is below 1.5%. ...
This manuscript presents the application of a recently developed noise reduction technology, constituted by poro-serrated stator blades on a full-scale aircraft model, in order to reduce rotor-stator interaction ...
Acknowledgments: The authors acknowledge the computing time on the Dutch National Computer Facilities, Cartesius, which was provided by the Dutch Research Council (NWO) through the project 2021/ENW/01050159 ...
doi:10.3390/aerospace9020070
fatcat:n2wszdrzuvgrbol77qhg4w7z4u
A survey of the research on power management techniques for high-performance systems
2010
Software, Practice & Experience
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This results in both high operating costs and high failure rates so it is now a major cause for concern. It is imposed new challenges to the development of high performance systems. ...
Based on this, we discuss the new opportunities and problems presented by the recent adoption of virtualization techniques, and again we present the most recent research on this. ...
Acknowledgement The authors would like to thank their colleagues in the Applied Formal Methods Research Group at the Department of Computing and Electronics of the Oxford Brookes University for valuable ...
doi:10.1002/spe.952
fatcat:64xblwxg2zc75ed6nztwzahde4
Compressed Air Energy Storage Capacity Configuration and Economic Evaluation Considering the Uncertainty of Wind Energy
2022
Energies
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Factors such as user load demand, time-of-use price of the power grid, system investment cost, power shortage cost, and power sales revenue were considered. ...
The results show that in the case of an hourly load power demand of a factory using 3.2 MW, a wind farm would need to keep four wind turbines running every day, and a compressed air energy storage system ...
Affected by the change of the upper limit of the power constraint, the overall carbon emission reduction is more than 100 kg higher than for schemes with a rated power of 0.5 MW under the same gas storage ...
doi:10.3390/en15134637
fatcat:szp6ezah2vdj7ho4s5xb2tu6ki
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