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You searched for +publisher:"Universidade Estadual de Campinas" +contributor:("Senger, Hermes"). Showing records 1 – 2 of 2 total matches.

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Universidade Estadual de Campinas

1. Piga, Leonardo de Paula Rosa, 1985-. Modeling, characterization, and optimization of web server power in data centers = Modelagem, caracterização e otimização de potência em centro de dados: Modelagem, caracterização e otimização de potência em centro de dados.

Degree: 2013, Universidade Estadual de Campinas

Abstract: To keep up with an increasing demand for computational resources, IT companies need to build facilities that host hundreds of thousands of computers, the data centers. This environment is highly dependent on electrical energy, a resource that is becoming expensive and limited. In this context, this thesis develops a global data center-level power and performance optimization approach for Web Server data centers. It presents a power measurement framework for commodity servers, develops empirical models for estimating the power consumed by Web servers, and implements one of the global power optimization heuristics on a state-of-the-art, high-density SeaMicro SM15k cluster by AMD. The power measuring framework is composed of a custom made board, which is able to capture the power consumption; a data acquisition device that samples the measured values; and a piece of software that manages the framework. We show a novel method for developing full system Web server power models that prunes model parameters and reduces non-linear relationships among performance measurements and system power. The Web server power models use as parameters performance indicators read from the machine internal performance counters. We evaluate our approach on an AMD Opteron-based Web server and on an Intel i7-based Web server. Our best model displays an average absolute error of 1.92% for the Intel i7 server and 1.46% for AMD Opteron as compared to actual measurements, and 90th percentile for the absolute percent error equals to 2.66% for Intel i7 and 2.08% for AMD Opteron. We deploy the global power management system in a state-of-the-art SeaMicro SM15k cluster. The implementation relies on the concept of Virtual Power States, a combination of CPU utilization rate to the P/C power states available in modern processors, and on our global optimization algorithm called Slack Recovery. We also propose and implement a novel mechanism to control utilization rates in each server, a key aspect of our power/performance optimization system. Experimental results show that our Slack Recovery-based system can reduce up to 16% of the power consumption when compared to the Linux performance governor and 6.7% when compared to the Linux ondemand governor Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Rigo, Sandro, 1975- (advisor), Bergamaschi, Reinaldo Alvarenga (coadvisor), Universidade Estadual de Campinas. Instituto de Computação (institution), Programa de Pós-Graduação em Ciência da Computação (nameofprogram), Navaux, Philippe Olivier Alexandre (committee member), Senger, Hermes (committee member), Madeira, Edmundo Roberto Mauro (committee member), Azevedo, Rodolfo Jardim de (committee member).

Subjects/Keywords: Arquitetura de computador; Centros de processamento de dados; Macromodelagem de potência; World Wide Web (Sistema de recuperação da informação) - Servidores; Energia elétrica - Conservação; Computer architecture; Data processing service centers; Power macromodeling; Web servers; Electric power conservation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Piga, Leonardo de Paula Rosa, 1. (2013). Modeling, characterization, and optimization of web server power in data centers = Modelagem, caracterização e otimização de potência em centro de dados: Modelagem, caracterização e otimização de potência em centro de dados. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/275608

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Piga, Leonardo de Paula Rosa, 1985-. “Modeling, characterization, and optimization of web server power in data centers = Modelagem, caracterização e otimização de potência em centro de dados: Modelagem, caracterização e otimização de potência em centro de dados.” 2013. Thesis, Universidade Estadual de Campinas. Accessed September 21, 2020. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275608.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Piga, Leonardo de Paula Rosa, 1985-. “Modeling, characterization, and optimization of web server power in data centers = Modelagem, caracterização e otimização de potência em centro de dados: Modelagem, caracterização e otimização de potência em centro de dados.” 2013. Web. 21 Sep 2020.

Vancouver:

Piga, Leonardo de Paula Rosa 1. Modeling, characterization, and optimization of web server power in data centers = Modelagem, caracterização e otimização de potência em centro de dados: Modelagem, caracterização e otimização de potência em centro de dados. [Internet] [Thesis]. Universidade Estadual de Campinas; 2013. [cited 2020 Sep 21]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/275608.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Piga, Leonardo de Paula Rosa 1. Modeling, characterization, and optimization of web server power in data centers = Modelagem, caracterização e otimização de potência em centro de dados: Modelagem, caracterização e otimização de potência em centro de dados. [Thesis]. Universidade Estadual de Campinas; 2013. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/275608

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Universidade Estadual de Campinas

2. Melo Junior, Alencar de. Escalonamento de pacotes para o modelo de diferenciação proporcional baseado em janelas de medidas: Packet scheduling for the proportional differentiation model based on measurement windows.

Degree: 2009, Universidade Estadual de Campinas

Abstract: Many applications that adapt to available resources have became popular lately in the Internet, suggesting that absolute levels of Quality of Services (QoS) are not essential for most applications. The Proportional Differentiation Model (PDM) constitutes currently one of the main proposals for the Next Generation Internet and adds one more possibility for application adaptation. This dissertation investigates the PDM, situating it along other existing service proposals and presents the Window Based Waiting-Time Priority (WBWTP) and Window Based Waiting-Time Priority Plus (WBWTP+) packet scheduling algorithms, which enable to achieve the PDM objectives with higher accuracy than the traditional Waiting-Time Priority (WTP) and Proportional Average Delay (PAD) algorithms. The performance of the algorithms is evaluated using a proposed QoS metric that supplies a single performance measurement for all service classes along a monitoring interval. Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Magalhães, Mauricio Ferreira, 1951- (advisor), Adán Coello, Juan Manuel (coadvisor), Universidade Estadual de Campinas. Faculdade de Engenharia Elétrica e de Computação (institution), Programa de Pós-Graduação em Engenharia Elétrica (nameofprogram), Vieira, Sibelius Lellis (committee member), Senger, Hermes (committee member), Motoyama, Shusaburo (committee member), Yamakami, Akebo (committee member).

Subjects/Keywords: Redes de computadores; Garantia de qualidade; Computer networks; Quality of service

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Melo Junior, A. d. (2009). Escalonamento de pacotes para o modelo de diferenciação proporcional baseado em janelas de medidas: Packet scheduling for the proportional differentiation model based on measurement windows. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/261010

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Melo Junior, Alencar de. “Escalonamento de pacotes para o modelo de diferenciação proporcional baseado em janelas de medidas: Packet scheduling for the proportional differentiation model based on measurement windows.” 2009. Thesis, Universidade Estadual de Campinas. Accessed September 21, 2020. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261010.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Melo Junior, Alencar de. “Escalonamento de pacotes para o modelo de diferenciação proporcional baseado em janelas de medidas: Packet scheduling for the proportional differentiation model based on measurement windows.” 2009. Web. 21 Sep 2020.

Vancouver:

Melo Junior Ad. Escalonamento de pacotes para o modelo de diferenciação proporcional baseado em janelas de medidas: Packet scheduling for the proportional differentiation model based on measurement windows. [Internet] [Thesis]. Universidade Estadual de Campinas; 2009. [cited 2020 Sep 21]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/261010.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Melo Junior Ad. Escalonamento de pacotes para o modelo de diferenciação proporcional baseado em janelas de medidas: Packet scheduling for the proportional differentiation model based on measurement windows. [Thesis]. Universidade Estadual de Campinas; 2009. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/261010

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.