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Dissertations / Theses on the topic 'Geo-distributed system'

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1

Anderson, Paul. "GeoS: A Service for the Management of Geo-Social Information in a Distributed System." Scholar Commons, 2010. https://scholarcommons.usf.edu/etd/1561.

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Applications and services that take advantage of social data usually infer social relationships using information produced only within their own context, using a greatly simplified representation of users' social data. We propose to combine social information from multiple sources into a directed and weighted social multigraph in order to enable novel socially-aware applications and services. We present GeoS, a geo-social data management service which implements a representative set of social inferences and can run on a decentralized system. We demonstrate GeoS' potential for social applicatio
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Tejankar, Vinayak Prabhakar. "Optimization of Data Propagation Algorithm for Conflict-Free Replicated Data Type-based Datastores in Geo-Distributed Edge Environment." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-284683.

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Replication primarily provides data availability by having multiple copies over different systems and is exploited to make distributed systems scalable in num- bers and geographical areas. Placing a replica closer to the source of request can also significantly reduce the time required to service the request, improv- ing applications’ performance. However, modifications done at a single copy need to be propagated to all the standing copies to maintain the data’s consis- tency. Over the years, numerous strategies have been proposed for handling the tradeoff between consistency and availability,
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Liu, Yimei [Verfasser], Thomas Akademischer Betreuer] Wunderlich, Matthäus [Akademischer Betreuer] Schilcher, and Liqiu [Akademischer Betreuer] [Meng. "Distributed geo-services based on Wireless GIS : a case study for post-quake rescue information system / Yimei Liu. Gutachter: Thomas Wunderlich ; Matthäus Schilcher ; Liqiu Meng. Betreuer: Liqiu Meng." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1014330742/34.

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4

Silva, Marcel Santos [UNESP]. "Sistemas de informações geográficas: elementos para o desenvolvimento de bibliotecas digitais geográficas distribuídas." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/93711.

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Made available in DSpace on 2014-06-11T19:26:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-08-29Bitstream added on 2014-06-13T20:55:15Z : No. of bitstreams: 1 santos_ms_me_mar.pdf: 2277134 bytes, checksum: 2c1d35de92755006ed8a8f0016328bfe (MD5)<br>Universidade Estadual Paulista (UNESP)<br>O desenvolvimento de tecnologias de informação e comunicação aplicadas às informações geográficas cresce de forma considerável e torna mais visível o aumento de Sistemas de Informações Geográficas, principalmente em ambientes governamentais, que buscam disponibilizar a informação geográfica a
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Qureshi, Asfandyar. "Power-Demand Routing in massive geo-distributed systems." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62430.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 165-171).<br>There is an increasing trend toward massive, geographically distributed systems. The largest Internet companies operate hundreds of thousands of servers in multiple geographic locations, and are growing at a fast clip. A single system's servers and data centers can consume many megawatts of electricity, as much as tens of thousands of US homes. Two important concerns have arisen: risi
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6

Bogdanov, Kirill. "Reducing Long Tail Latencies in Geo-Distributed Systems." Licentiate thesis, KTH, Network Systems Laboratory (NS Lab), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194729.

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Computing services are highly integrated into modern society. Millions of people rely on these services daily for communication, coordination, trading, and accessing to information. To meet high demands, many popular services are implemented and deployed as geo-distributed applications on top of third party virtualized cloud providers. However, the nature of such deployment provides variable performance characteristics. To deliver high quality of service, such systems strive to adapt to ever-changing conditions by monitoring changes in state and making run-time decisions, such as choosing serv
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Falgert, Marcus. "Geo-distributed application deployment assistance based on past routing information." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-206970.

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Cloud computing platforms allow users to deploy geographically distributed applications on servers around the world. Applications may be simple to deploy on these platforms, but it is up to the user and the application to decide which regions and servers to use for application placement. Furthermore, network conditions and routing between the geo-distributed servers change over time, which can lead to sub-optimal performance of applications deployed on such servers. A user could either employ a static deployment configuration of servers, or attempt to use a more dynamic configuration. However,
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8

Toumlilt, Ilyas. "Colony : a Hybrid Consistency System for Highly-Available Collaborative Edge Computing." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS447.

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La distribution et la réplication des données en périphérie du réseau apportent une réponse immédiate, une autonomie et une disponibilité aux applications de périphérie, telles que les jeux, l’ingénierie coopérative ou le partage d’informations sur le terrain. Cependant, les développeurs d’applications et les utilisateurs exigent les meilleures garanties de cohérence possibles, ainsi qu’un support spécifique pour la collaboration de groupe. Pour relever ce défi, Colony garantit la cohérence Transactional Causal Plus Consistency (TCC+) à échelle planétaire, en complément de l’isolation des inst
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9

Vasilas, Dimitrios. "A flexible and decentralised approach to query processing for geo-distributed data systems." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS132.

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Cette thèse présente l'étude de la conception de systèmes de traitement de requêtes dans divers cadres géo-distribués. L'optimisation des mesures de performance telles que le temps de réponse, la fraîcheur ou le coût opérationnel implique des décisions de conception tel que le choix de l’état dérivé (indices, vues matérialisées, caches par ex.) à construire et maintenir, et la distribution et le placement de ces derniers et de leurs calculs. Ces métriques sont souvent opposées et les compromis dépendent de l'application et/ou de la spécificité de l'environnement. La capacité d'adapter la topol
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10

Silva, Marcel Santos. "Sistemas de informações geográficas : elementos para o desenvolvimento de bibliotecas digitais geográficas distribuídas /." Marília : [s.n.], 2006. http://hdl.handle.net/11449/93711.

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Orientador: Silvana Aparecida Borsetti Gregório Vidotti<br>Banca: Plácida Leopoldina Ventura Amorim da Costa Santos<br>Banca: Sérgio Antonio Rohm<br>Resumo: O desenvolvimento de tecnologias de informação e comunicação aplicadas às informações geográficas cresce de forma considerável e torna mais visível o aumento de Sistemas de Informações Geográficas, principalmente em ambientes governamentais, que buscam disponibilizar a informação geográfica a um número de pessoas cada vez maior. O objetivo deste trabalho é apresentar uma arquitetura com elementos para a construção de uma Biblioteca Digital
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11

Franca, Rezende Tuanir. "Leaderless state-machine replication : from fail-stop to Byzantine failures." Electronic Thesis or Diss., Institut polytechnique de Paris, 2021. http://www.theses.fr/2021IPPAS016.

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Les services distribués modernes doivent être hautement disponibles, car nos sociétés en sont de plus en plus dépendantes. La manière la plus courante d'obtenir une haute disponibilité est de répliquer les données dans plusieurs répliques du service. De cette façon, le service reste opérationnel en cas de pannes, car les clients peuvent être relayés vers d'autres répliques qui fonctionnent. Dans les systèmes distribués, la technique classique pour mettre en œuvre de tels services tolérants aux pannes est appelée réplication de machine d'état (State-Machine Replication, SMR), où un service est
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12

Darrous, Jad. "Scalable and Efficient Data Management in Distributed Clouds : Service Provisioning and Data Processing." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEN077.

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Cette thèse porte sur des solutions pour la gestion de données afin d'accélérer l'exécution efficace d'applications de type « Big Data » (très consommatrices en données) dans des centres de calculs distribués à grande échelle. Les applications de type « Big Data » sont de plus en plus souvent exécutées sur plusieurs sites. Les deux principales raisons de cette tendance sont 1) le déplacement des calculs vers les sources de données pour éliminer la latence due à leur transmission et 2) le stockage de données sur un site peut ne pas être réalisable à cause de leurs tailles de plus en plus import
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13

Chen, Yi-Chia, and 陳奕佳. "An approach based on matching theory to distributed deployment of NFV-based network services to geo-distributed edge computing systems." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/h7kasp.

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碩士<br>國立交通大學<br>資訊科學與工程研究所<br>107<br>With both Network Function Virtualization (NFV) and Multi-access Edge Computing (MEC) environment, network service providers can deploy their NFV-based network services on the edge servers maintained by edge service providers (ESPs) to serve end users. Nevertheless, determining which ESP to lease resource and how much to pay for the deployment will become an important issue for the network service providers. For the ESPs, determining which network serive to serve and how much to charge from its provider is also an important issue. We proposed a two-layer me
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14

Fouto, Pedro Filipe Veiga. "A novel causally consistent replication protocol with partial geo-replication." Master's thesis, 2018. http://hdl.handle.net/10362/63048.

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Distributed storage systems are a fundamental component of large-scale Internet services. To keep up with the increasing expectations of users regarding availability and latency, the design of data storage systems has evolved to achieve these properties, by exploiting techniques such as partial replication, geo-replication and weaker consistency models. While systems with these characteristics exist, they usually do not provide all these properties or do so in an inefficient manner, not taking full advantage of them. Additionally, weak consistency models, such as eventual consistency, pu
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15

Fernandes, Flávio Duarte Pacheco. "LHView: Location Aware Hybrid Partial View." Master's thesis, 2017. http://hdl.handle.net/10362/66268.

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The rise of the Cloud creates enormous business opportunities for companies to provide global services, which requires applications supporting the operation of those services to scale while minimizing maintenance costs, either due to unnecessary allocation of resources or due to excessive human supervision and administration. Solutions designed to support such systems have tackled fundamental challenges from individual component failure to transient network partitions. A fundamental aspect that all scalable large systems have to deal with is the membership of the system, i.e, tracking th
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