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Pontifical Catholic University of Rio de Janeiro

1. RAFAEL OLIVEIRA VASCONCELOS. [en] AN EFFICIENT APPROACH TO COORDINATED RECONFIGURATION IN DISTRIBUTED DATA STREAM SYSTEMS.

Degree: 2017, Pontifical Catholic University of Rio de Janeiro

[pt] Ao mesmo tempo em que sistemas de processamento de fluxo de dados devem prover serviços de análise e manipulação de dados ininterruptamente (disponibilidade 24x7), eles comumente também precisam lidar com mudanças em seus ambientes de execução (e.g., alterar a topologia da rede) e nos requisitos que eles devem cumprir (e.g., adição de novas funções de processamento dos fluxos de dados). Por um lado, reconfiguração dinâmica de software (i.e., a capacidade de substituir parte do software em tempo de execução) é uma característica desejável. Por outro lado, sistemas de fluxo de dados podem sofrer com a interrupção e sobrecarga causada pela reconfiguração. Por conta da necessidade de reconfigurar (i.e., evoluir) o sistema ao mesmo tempo em que o sistema não pode ser interrompido (i.e., bloqueado), reconfiguração consistente e não bloqueante é ainda considerada um problema em aberto na literatura. Esta tese apresenta e valida uma abordagem não quiescente para reconfiguração dinâmica de software que preserva a consistência de sistemas de fluxo de dados distribuídos. A abordagem proposta permite que o sistema seja reconfigurado gradual e suavemente, sem precisar interromper o processamento do fluxo de dados ou atingir a quiescência. A avaliação indica que a abordagem proposta realiza reconfiguração distribuída consistentemente e tem um impacto desprezível sobre a diminuição na disponibilidade e no desempenho do sistema. Além disto, a implementação da abordagem proposta teve um desempenho melhor em todos os testes comparativos.

[en] While many data stream systems have to provide continuous (24x7) services with no acceptable downtime, they also have to cope with changes in their execution environments and in the requirements that they must comply (e.g., moving from on-premises architecture to a cloud system, changing the network technology, adding new functionality or modifying existing parts). On one hand, dynamic software reconfiguration (i.e., the capability of evolving on the fly) is a desirable feature. On the other hand, stream systems may suffer from the disruption and overhead caused by the reconfiguration. Due to the necessity of reconfiguring (i.e., evolving) the system whilst the system must not be disrupted (i.e., blocked), consistent and non-disruptive reconfiguration is still considered an open problem. This thesis presents and validates a non-quiescent approach for dynamic software reconfiguration that preserves the consistency of distributed data stream processing systems. Unlike many works that require the system to reach a safe state (e.g., quiescence) before performing a reconfiguration, the proposed approach enables the system to smoothly evolve (i.e., be reconfigured) in a non-disruptive way without reaching quiescence. The evaluation indicates that the proposed approach supports consistent distributed reconfiguration and has negligible impact on availability and performance. Furthermore, the implementation of the proposed approach showed better performance results in all experiments than the…

Advisors/Committee Members: MARKUS ENDLER.

Subjects/Keywords: [pt] ADAPTABILIDADE; [en] ADAPTABILITY; [pt] COMUNICACAO MOVEL; [en] MOBILE COMMUNICATION; [pt] RECONFIGURACAO DINAMICA; [en] DYNAMIC RECONFIGURATION; [pt] PROCESSAMENTO DE FLUXO DE DADOS; [en] DATA STREAM PROCESSING; [pt] ADAPTACAO DE SOFTWARE; [en] SOFTWARE ADAPTATION

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

APA (6th Edition):

VASCONCELOS, R. O. (2017). [en] AN EFFICIENT APPROACH TO COORDINATED RECONFIGURATION IN DISTRIBUTED DATA STREAM SYSTEMS. (Thesis). Pontifical Catholic University of Rio de Janeiro. Retrieved from http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=30660

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):

VASCONCELOS, RAFAEL OLIVEIRA. “[en] AN EFFICIENT APPROACH TO COORDINATED RECONFIGURATION IN DISTRIBUTED DATA STREAM SYSTEMS.” 2017. Thesis, Pontifical Catholic University of Rio de Janeiro. Accessed August 23, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=30660.

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

MLA Handbook (7th Edition):

VASCONCELOS, RAFAEL OLIVEIRA. “[en] AN EFFICIENT APPROACH TO COORDINATED RECONFIGURATION IN DISTRIBUTED DATA STREAM SYSTEMS.” 2017. Web. 23 Aug 2017.

Vancouver:

VASCONCELOS RO. [en] AN EFFICIENT APPROACH TO COORDINATED RECONFIGURATION IN DISTRIBUTED DATA STREAM SYSTEMS. [Internet] [Thesis]. Pontifical Catholic University of Rio de Janeiro; 2017. [cited 2017 Aug 23]. Available from: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=30660.

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

Council of Science Editors:

VASCONCELOS RO. [en] AN EFFICIENT APPROACH TO COORDINATED RECONFIGURATION IN DISTRIBUTED DATA STREAM SYSTEMS. [Thesis]. Pontifical Catholic University of Rio de Janeiro; 2017. Available from: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=30660

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

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