Distributed databases synchronization in named data delay tolerant networks

Detalhes bibliográficos
Autor(a) principal: Liu, Chong
Data de Publicação: 2016
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/47367
Resumo: Dissertação de mestrado em Engenharia de Redes e Serviços Telemáticos
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spelling Distributed databases synchronization in named data delay tolerant networksSincronização em bases de dados distribuídas em redes tolerantes a atrasos em dados nomeadosEngenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e InformáticaDissertação de mestrado em Engenharia de Redes e Serviços TelemáticosDelay Tolerant Network (DTN) is a small regional network designed to provide better communications when the end-to-end connection is not always possible. DTN is well known for intermittent connections and long delays. Nodes store data packets in the buffers and forward later when the connection is restored. Recently, Named Data Networking (NDN) has been drawing wide attention as a Future Internet architecture. This architecture shifts the emphasis from host to content and pays little attention to where is the content. Routing in NDN is based on the name of the content. Named Data-Delay Tolerant (ND-DT) network is an integration of DTN and NDN. It takes the advantages of both architectures by applying named data approach in DTN scenarios. In ND-DT network, distributed databases are maintained by a group of fixed or moving nodes. Data inconsistency always exists because of the intermittent connections and long delays. However, data synchronization solutions can minimize this inconsistency, helping to reduce the data access delay. ChronoSync is a well-known NDN state synchronization protocol. Data synchronization in ND-DT networks are challenging because of the intermittent connections and the nodes’ mobility. Moreover, the connection between nodes is not assured, which may make synchronization to fail. In this work, it is assumed that there is at least one path between each pair of database nodes. The aim of this work is to improve the recovery process of ChronoSync in order to enhance its adaptability to ND-DT network scenarios. For this goal, ChronoSync and our improved solution were implemented and tested on an ND-DT network simulator. The results show that our improved ChronoSync is more adaptable to ND-DT networks. The improved ChronoSync consumes less time to finish synchronization tasks in all the scenarios. What’s more, in three database scenarios, IChronoSync decreasing about 83% of the synchronization time while Chronosync decreases 62% when changed from sparse network to dense network. What’s more, improved ChronoSync generates 27% fewer data packets, which can increase the probability of other network nodes getting connected.Macedo, JoaquimCosta, AntónioUniversidade do MinhoLiu, Chong2016-10-062016-10-06T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/1822/47367eng201600269info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:49:05Zoai:repositorium.sdum.uminho.pt:1822/47367Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:47:30.095107Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Distributed databases synchronization in named data delay tolerant networks
Sincronização em bases de dados distribuídas em redes tolerantes a atrasos em dados nomeados
title Distributed databases synchronization in named data delay tolerant networks
spellingShingle Distributed databases synchronization in named data delay tolerant networks
Liu, Chong
Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática
title_short Distributed databases synchronization in named data delay tolerant networks
title_full Distributed databases synchronization in named data delay tolerant networks
title_fullStr Distributed databases synchronization in named data delay tolerant networks
title_full_unstemmed Distributed databases synchronization in named data delay tolerant networks
title_sort Distributed databases synchronization in named data delay tolerant networks
author Liu, Chong
author_facet Liu, Chong
author_role author
dc.contributor.none.fl_str_mv Macedo, Joaquim
Costa, António
Universidade do Minho
dc.contributor.author.fl_str_mv Liu, Chong
dc.subject.por.fl_str_mv Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática
topic Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática
description Dissertação de mestrado em Engenharia de Redes e Serviços Telemáticos
publishDate 2016
dc.date.none.fl_str_mv 2016-10-06
2016-10-06T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/47367
url http://hdl.handle.net/1822/47367
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 201600269
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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