Relevant bibliographies by topics / Cloud computing services / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Cloud computing services.

Dissertations / Theses on the topic 'Cloud computing services'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Cloud computing services.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Fargo, Farah Emad. "Resilient Cloud Computing and Services." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/347137.

Full text
Abstract:
Cloud Computing is emerging as a new paradigm that aims at delivering computing as a utility. For the cloud computing paradigm to be fully adopted and effectively used it is critical that the security mechanisms are robust and resilient to malicious faults and attacks. Securing cloud is a challenging research problem because it suffers from current cybersecurity problems in computer networks and data centers and additional complexity introduced by virtualizations, multi-tenant occupancy, remote storage, and cloud management. It is widely accepted that we cannot build software and computing systems that are free from vulnerabilities and that cannot be penetrated or attacked. Furthermore, it is widely accepted that cyber resilient techniques are the most promising solutions to mitigate cyberattacks and change the game to advantage defender over attacker. Moving Target Defense (MTD) has been proposed as a mechanism to make it extremely challenging for an attacker to exploit existing vulnerabilities by varying different aspects of the execution environment. By continuously changing the environment (e.g. Programming language, Operating System, etc.) we can reduce the attack surface and consequently, the attackers will have very limited time to figure out current execution environment and vulnerabilities to be exploited. In this dissertation, we present a methodology to develop an Autonomic Resilient Cloud Management (ARCM) based on MTD and autonomic computing. The proposed research will utilize the following capabilities: Software Behavior Obfuscation (SBO), replication, diversity, and Autonomic Management (AM). SBO employs spatiotemporal behavior hiding or encryption and MTD to make software components change their implementation versions and resources randomly to avoid exploitations and penetrations. Diversity and random execution is achieved by using AM that will randomly "hot" shuffling multiple functionally-equivalent, behaviorally-different software versions at runtime (e.g., the software task can have multiple versions implemented in a different language and/or run on a different platform). The execution environment encryption will make it extremely difficult for an attack to disrupt normal operations of cloud. In this work, we evaluated the performance overhead and effectiveness of the proposed ARCM approach to secure and protect a wide range of cloud applications such as MapReduce and scientific and engineering applications.
APA, Harvard, Vancouver, ISO, and other styles
2

Filho, Filomena de Jesus Francisco Correia. "Cloud Computing: um estudo de viabilidade." Master's thesis, Instituto Politécnico de Setúbal. Escola Superior de Ciências Empresariais, 2015. http://hdl.handle.net/10400.26/10451.

Full text
Abstract:
Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Sistemas de Informação Organizacionais
O conceito de Cloud Computing tem evoluído constantemente, na vertente dos modelos de serviços, baseados em pool de recursos tecnológicos. Cada vez mais, tem-se utilizado a tecnologia de virtualização para a otimização dos recursos, os quais são partilhados por todos os clientes, num formato de self-service. Estas características resultam num comportamento flexível e escalável dos recursos. A gestão do serviço disponibilizado, efetua-se em função do acordo de níveis de serviço estabelecidos, entre cliente e o fornecedor da Cloud, e a constante evolução tecnológica proporciona rápidas mutações ao nível das Tecnologias de Informação e Comunicação (TIC). O estudo, de cariz qualitativo, é guiado por um Estudo de Caso, realizado na Província de Luanda, na empresa de telecomunicações FILHO, S.A., a fim de procurar novas soluções com o intuito de aumentar a produtividade da empresa, levando a que se ponderem soluções inovadoras, de rápida implementação e de baixo custo. O objetivo geral desta dissertação é analisar a viabilidade da adoção da Cloud Computing na FILHO, S.A. através de duas perspetivas: a virtualização de ambiente de trabalho desktop em servidores de Data center interno e a utilização de serviços de gestão arquivo do correio eletrónico em infraestrutura do fornecedor (Public Cloud) instigando as organizações angolanas a darem um passo – calculado e esclarecido - na adoção desta nova tecnologia, pois acreditamos ser significativo no sentido de incentivar maior produtividade. No que concerne ao estudo empírico, conclui-se que a problemática deverá ser devidamente pensada no aspeto contratual, a prudência vai para o cuidado na escolha do fornecedor e na contratualização de níveis de serviços adequados. Conclui-se que existe viabilidade da migração do e-mail para a cloud pública, ao invés das aplicações core, as quais pela sua avaliação, fator estratégico, segurança e ausência de leis especificas não se aconselha de imediato a sua migração, quanto à viabilidade da virtualização de desktop em servidores de Data center interno apontam para a realização de protótipos que avaliem no terreno a viabilidade das soluções propostas.
Abstract: The concept of Cloud Computing has evolved constantly, in strand of service models, based on pooling of technological resources. Increasingly, it has used virtualization technology to optimize resources, which are shared by all accounts, a self-service format. These features result in a flexible and progressive behavior of resources. The management of the service provided, makes up depending on the service level agreement established between the client and the cloud provider, and the constant Technological developments are rapidly changing in terms of Information and Communication Technologies (TIC). The study, of qualitative nature, is guided by a Case Study, held in Luanda Province, the telecommunications company Filho, S.A., in order to seek new solutions for the purpose of increase productivity of the company, leading to what is consider innovative solutions, rapid implementation and low cost. The overall objective of this dissertation is to examine the feasibility of the adoption of the Cloud Computing in Filho, S.A through two perspectives: the virtualization of desktop work environment internal datacenter servers and the use of the email file management services in infrastructure of the supplier (Public Cloud) instigating the Angolan organizations to take a step - calculated and informed - in the adoption of this new technology because we believe it is meaningful towards encouraging greater productivity. Concerning the empirical study, it is concluded that the issue should be appropriately thought out in the contractual aspect, prudence goes to careful in selecting the supplier and the contract awarding of adequate service levels. It is concluded that there is viability of e-mail migration to the public cloud, rather than of core applications, which for its evaluation, strategic factor, safety and absence of specific laws is not advised immediately to their migration, as to the feasibility desktop virtualization in data center internal servers point to the construction of prototypes which assess the field the feasibility of the solutions proposed.
APA, Harvard, Vancouver, ISO, and other styles
3

Al-Bayati, Burhan Mollan Salih. "Continuous identity verification in cloud computing services." Thesis, University of Plymouth, 2018. http://hdl.handle.net/10026.1/12832.

Full text
Abstract:
Cloud computing has become a hugely popular new paradigm for hosting and delivering services over the internet for individuals and organisations with low cost. However, security is a sensitive issue in cloud computing, as it its services remain accessible to anyone after initial authenticated login and for significant periods. This has led to an increase in the number of attacks on sensitive cus-tomer information. This research identified biometric approaches as a possible solution for security to be maintained beyond the point of entry. Specifically, behaviour profiling has been proposed and applied across various other applications in the area of Transparent Authentication Systems (TAS's) and Intrusion Detection Systems (IDS's) to detect account misuse. However, little research has sought to imple-ment this technique within cloud computing services to detect misuse. This research proposes a novel continuous identity verification system as a supporting factor to protect cloud users by operating transparently to detect ab-normal access. The research examines the feasibility of applying a behavioural profiling technique on cloud users with respect to Software as a Service (SaaS) and Infrastructure as a Service (IaaS). Two real-life datasets were collected from 30 and 60 users for SaaS and IaaS studies, respectively. A thorough design and investigation of the biometric techniques was undertaken, including description statistics analysis and pattern classification optimisation. A number of factors were analysed to evaluate the impact on system performance, such as volume of data and type of sample selection. On average, using random sampling, the best experimental result achieved an EER (Equal Error Rate) of as low as 5.8%; six users experienced EERs equal to or less than 0.3%. Moreover, the IaaS study achieved a higher performance than the SaaS study with an overall EER of 0.32%. Based on the intensive analysis of the experimental performance of SaaS and IaaS studies, it has been identified that changes in user behaviour over time can negatively affect the performance of the suggested technique. Therefore, a dy-namic template renewal procedure has been proposed as a novel solution to keep recent user behaviour updated in the current users' templates. The practi-cal experimental result using the more realistic time-series sampling methodolo-gy has shown the validity of the proposed solution with higher accuracy of 5.77 % EER.
APA, Harvard, Vancouver, ISO, and other styles
4

Houacine, Fatiha. "Service-Oriented Architecture for the Mobile Cloud Computing." Thesis, Paris, CNAM, 2016. http://www.theses.fr/2016CNAM1110/document.

Full text
Abstract:
La croissance des appareils connectés, principalement due au grand nombre de déploiements de l'internet des objets et à l'émergence des services de cloud mobile, introduit de nouveaux défis pour la conception d'architectures de services dans le Cloud Computing Mobile (CCM) du cloud computing mobile. Nous montrons dans cette thèse comment l'architecture orientée services SOA peut être une solution clé pour fournir des services cloud mobiles distribués et comment la plate-forme OSGi peut être un cadre adaptatif et efficace pour fournir une telle implémentation. Nous adaptons le cadre CCM proposé à différents contextes d'architecture. Le premier est un modèle centré traditionnel, où les appareils mobiles sont réduits à consommer des services. Le second est un modèle distribué où la puissance de l'interaction de mobile à mobile offre des opportunités illimitées de services de valeur, et enfin, l'architecture à trois niveaux est considérée avec l'introduction de la notion de cloudlet. Pour chaque contexte, nous explorons la performance de notre cadre axé sur le service et le comparons à d'autres solutions existantes
The growth of connected devices, mostly due to the large number of internet of things IoT deployments and the emergence of mobile cloud services, introduces new challenges for the design of service architectures in mobile cloud computing MCC. An MCC framework should provide elasticity and scalability in a distributed and dynamic way while dealing with limited environment resources and variable mobile contexts web applications, real-time, enterprise services, mobile to mobile, hostile environment, etc. that may include additional constraints impacting the design foundation of cloud services. We show in this thesis how service-oriented architecture SOA can be a key solution to provide distributed mobile cloud services and how OSGi platform can be an adaptive and efficient framework to provide such implementation. We adapt the proposed MCC framework to different architecture contexts. The first one is a traditional centric model, where mobile devices are reduced to consuming services. The second one is a distributed model where the power of mobile-to-mobile interaction offers unlimited value-services opportunities, and finally, three-tier architecture is considered with the introduction of the cloudlet notion. For each context, we explore the performance of our service-oriented framework, and contrast it with alternative existing solutions
APA, Harvard, Vancouver, ISO, and other styles
5

Qiu, Xuanjia, and 邱炫佳. "Dynamic utility maximization for multi-cloud based services." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206669.

Full text
Abstract:
More and more clouds with diversified properties have been built. Many of them span multiple geographical locations over the globe, imposing time-varying costs on and offering different service proximities to users. Clouds could be private or public, requiring different levels of administration effort and providing different levels of freedom to control. Hybrid clouds, which blend together multiple public and private clouds, possess properties of both types. Based on these diversified properties, multiple clouds have the potential to provide services with higher scalability, lower operational cost and better QoS. To exploit this potential, I examine the means of deploying services on multiple clouds, that can maximize utility in dynamic environments. Firstly, I consider the migration of an important representative application, content distribution services, to geo-distributed hybrid clouds. I model the problem of joint content data migration and request dispatching as a unified optimization framework, and then design a dynamic control algorithm to solve it. The algorithm bounds the response times within the preset QoS target, and guarantees that the overall cost is within a small constant gap from the optimum that can be achieved by a T-slot look ahead mechanism with known future information. Secondly, I study the problem of efficient scheduling for disparate MapReduce workloads on hybrid clouds. I build a fine-grained and tractable model to characterize the scheduling of heterogeneous MapReduce workloads. An online algorithm is proposed for joint task admission control for the private cloud, task outsourcing to the public cloud, and VM allocation to execute the admitted tasks on the private cloud, such that the time-averaged task outsourcing cost is minimized over the long run. The online algorithm features preemptive scheduling of the tasks, where a task executed partially on the on-premise infrastructure can be paused and scheduled to run later. It also achieves such desirable properties as meeting a pre-set task admission ratio and bounding the worst-case task completion time. Thirdly, I consider a cloud computing resource market where a broker is employed that pools the spare resources of multiple private clouds and leases them to serve external users' jobs. I model the interaction between the broker and the private clouds as a two-stage Stackelberg game. As the leader in the game, the broker decides on the pricing for renting VMs from each private cloud. As a follower, each private cloud responds with the number of VMs that it is willing to lease. Combining all this with Lyapunov optimization theory, I design online algorithms for the broker to set the prices and schedule the jobs on the private clouds, and for each private cloud to decide the numbers of VMs to lease. The broker achieves a time-averaged profit that is close to the offline optimum with complete information on future job arrivals and resource availability, while each private cloud earns the best that it can. Through theoretical analysis and empirical study, I rigorously examine the cost or profit optimality, and QoS guarantee of my design, and show that they can indeed outperform existing solutions.
published_or_final_version
Computer Science
Doctoral
Doctor of Philosophy
APA, Harvard, Vancouver, ISO, and other styles
6

Retana, Solano German F. "Technology support and demand for cloud infrastructure services: the role of service providers." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50236.

Full text
Abstract:
Service providers have long recognized that their customers play a vital role in the service delivery process since they are not only recipients but also producers, or co-producers, of the service delivered. Moreover, in the particular context of self-service technology (SST) offerings, it is widely recognized that customers’ knowledge, skills and abilities in co-producing the service are key determinants of the services’ adoption and usage. However, despite the importance of customers’ capabilities, prior research has not yet paid much attention to the mechanisms by which service providers can influence them and, in turn, how the providers’ efforts affect customers’ use of the service. This dissertation addresses research questions associated with the role of a provider’s technology support and education in influencing customer use of an SST, namely public cloud computing infrastructure services. The unique datasets used to answer these research questions were collected from one of the major global providers in the cloud infrastructure services industry. This research context offers an excellent opportunity to study the role of technology support since, when adapting the standardized and commoditized components of the cloud service to their individual needs, customers may face important co-production costs that can be mitigated by the provider’s assistance. Specifically, customers must configure their computing servers and deploy their software applications on their own, relying on their own capabilities. Moreover, the cloud’s offering of on-demand computing servers through a fully pay-per-use model allows us to directly observe variation in the actual use customers make of the service. The first study of this dissertation examines how varying levels of technology support, which differ in the level of participation and assistance of the provider in customers’ service co-production process, influence the use that customers make of the service. The study matches and compares 20,179 firms that used the service between March 2009 and August 2012, and who over time accessed one of the two levels of support available: full and basic. Using fixed effects panel data models and a difference-in-difference identification strategy, we find that customers who have access to full support or accessed it in the past use (i.e., consume) more of the service than customers who have only accessed basic support. Moreover, the provider’s involvement in the co-production process is complementary with firm size in the sense that larger firms use more of the service than smaller ones if they upgrade from basic to full support. Finally, the provider’s co-participation through full support also has a positive influence on the effectiveness with which buyers make use of the service. Firms that access full support are more likely to deploy computing architectures that leverage on the cloud’s advanced features. The second study examines the value of early proactive education, which is defined as any provider-initiated effort to increase its customers’ service co-production related knowledge and skills immediately after service adoption. The study analyzes the outcome of a field experiment executed by the provider between October and November 2011, during which 366 randomly-selected customers out of 2,673 customers that adopted during the field experiment period received early proactive education treatment. The treatment consisted in a short phone call followed up by a support ticket through which the provider offered initial guidance on how to use the basic features of the service. We use survival analysis (i.e., hazard models) to compare the treatment’s effect on customer retention, and find that it reduces by half the number of customers who leave the service offering during the first week. We also use count data models to examine the treatment’s effect on customers’ demand for technology support, and find that the treated customers ask about 19.55% fewer questions during the first week of their lifetimes than the controls.
APA, Harvard, Vancouver, ISO, and other styles
7

Polk, Nekerral. "Adoption of Cloud Computing Services in an Illinois-Based Insurance Company." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/7058.

Full text
Abstract:
The decision to adopt cloud computing services should involve business units of an insurance company as well as information technology (IT) because cloud computing services are viewed as both a technology offering and business alternative. The purpose of this qualitative exploratory case study was to explore the strategies used by IT architects of an Illinois-based insurance company when adopting cloud computing services. The theory supporting this study was the technology acceptance model. The study's population consisted of IT architects from an Illinois-based insurance company that have used strategies to adopt cloud computing services. This study's data collection included semistructured interviews and review of organizational documents. Member checking with each participant increased the validity of this study's findings. Four major themes emerged from this study: strategies to adopt cloud computing services, strategies to adopt cloud services models, strategies to adopt cloud computing models, and concerns affecting the strategies to adopt cloud computing services. The study findings may assist IT architects in developing effective strategies to adopt cloud computing services for their respective business unit. This study might serve as a foundation for positive social change by decreasing customer concerns regarding critical information being compromised when adopting cloud computing services.
APA, Harvard, Vancouver, ISO, and other styles
8

Sapkota, Sagar, and Khawar Shehzad. "Cloud Computing for Telecom Systems." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3068.

Full text
Abstract:
Context: Cloud computing is reshaping the service-delivery and business-models in Information and Communications Technology (ICT). The Information Technology (IT) sector has benefited from it in the previous 3-5 years. Despite the attraction of cloud computing, it is required to have an effective application migration strategy. Cloud computing with its diverse provisioning models makes it possible for telecom vendors and service providers to decide effective service and business models. Currently, cloud computing contains security, performance and dimensioning considerations for telecom companies. Objectives: This thesis assesses the trends and issues associated with the cloud, with telecommunications perspective, while leveraging the cloud to come to a decision on a suitable cloud environment for telecom grade applications. Analysis of maturity of public cloud (in terms of compatibility, consolidation, compliance and standardization) in general and Amazon cloud in particular, is part of the thesis objective. While doing so, deployment of a telecom-grade product in the Amazon cloud will be evaluated against the current on-premise deployment. We want to identify architectural difference between the two domains, and what issues are faced when a migration is planned. This evaluation between two systems, i.e. on-premise and the cloud will significantly contribute to the research and can be used when making business decisions. Methods: We conducted literature review, survey, and a case study, assessing the above mentioned objectives. Research papers from academia and industry were chosen for literature review; personnel, with experience in cloud computing, were chosen for the survey; and a telecom-grade platform was used to assess the migration issues on Amazon cloud in the case study. The Ericsson Composition Engine (ECE) was used to check what deployment issues it can have on Amazon cloud. Its on-premise Reference Deployment Architecture was compared with the cloud-based Reference Deployment Architecture. This case study served as a confirmation to results obtained in the literature review and survey. Results: In the literature review and survey, we found motivations, trends, current applications, and challenges of cloud computing for telecom. It was found from the case study that Amazon Web Services (AWS) lacks application and network centric attributes that are required in ECE deployment. We propose recommendations that can be integrated with ECE while deploying it in a public cloud. Conclusions: Companies are choosing cloud vendors that uniquely give ease of migration and control, based on application needs and compatibility. ECE cannot be directly migrated to AWS, unless we provide Amazon specific modifications in the architecture. The survey and literature review support a private and/or hybrid strategy for ECE, along with the inclusion of cloud networking into the ECE package.
APA, Harvard, Vancouver, ISO, and other styles
9

Kelley, Nancy J. "An investigation into specifying service level agreements for provisioning cloud computing services." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/27852.

Full text
Abstract:
Within the U.S. Department of Defense (DoD), service level agreements are a widely used tool for acquiring enterprise-level information technology (IT) resources. In order to contain, if not reduce, the total cost of ownership of IT resources to the enterprise, the DoD has undertaken outsourcing its IT needs to Cloud service providers. In this thesis, we explore how service level agreements are specified for non-Cloud-based services, followed by determining how to tailor those practices to specifying service level agreements for Cloud-based service provision, with a focus on end-to-end management of the service-provisioning.
APA, Harvard, Vancouver, ISO, and other styles
10

Sangroya, Amit. "Towards dependability and performance benchmarking for cloud computing services." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENM016/document.

Full text
Abstract:
Le Cloud Computing est en plein essor, grace a ses divers avantages, telsl'elasticite, le cout, ou encore son importante exibilite dans le developpementd'applications. Il demeure cependant des problemes en suspens, lies auxperformances, a la disponibilite, la fiabilite, ou encore la securite. De nombreusesetudes se focalisent sur la fiabilite et les performance dans les servicesdu Cloud, qui sont les points critiques pour le client. On retrouve parmicelles-ci plusieurs themes emergents, allant de l'ordonnancement de tachesau placement de donnees et leur replication, en passant par la tolerance auxfautes adaptative ou a la demande, et l'elaboration de nouveaux modeles defautes.Les outils actuels evaluant la fiabilite des services du Cloud se basent surdes parametres simplifies. Ils ne permettent pas d'analyser les performancesou de comparer l'efficacite des solutions proposees. Cette these aborde precisement ce probleme en proposant un modele d'environnement complet detest destine a evaluer la fiabilite et les performances des services de CloudComputing. La creation d'outils de tests destines a l'evaluation de la fiabiliteet des performances des services du Cloud pose de nombreux defis, en raisonde la grande quantite et de la complexite des donnees traitees par ce genrede services. Les trois principaux modeles de Cloud Computing sont respectivement:Infrastructure en tant que Service (IaaS), Plate-forme en tant queService (PaaS) et Logiciel en tant que Service (SaaS).Dans le cadre de cettethese, nous nous concentrons sur le modele PaaS. Il permet aux systemesd'exploitation ou aux intergiciels d'etre accessibles via une connexion internet.Nous introduisons une architecture de test generique, qui sera utiliseepar la suite lors de la creation d'outils de tests, destines a l'evaluation de lafiabilite et de la performance
Cloud computing models are attractive because of various benefits such asscalability, cost and exibility to develop new software applications. However,availability, reliability, performance and security challenges are still not fullyaddressed. Dependability is an important issue for the customers of cloudcomputing who want to have guarantees in terms of reliability and availability.Many studies investigated the dependability and performance of cloud services,ranging from job scheduling to data placement and replication, adaptiveand on-demand fault-tolerance to new fault-tolerance models. However, thead-hoc and overly simplified settings used to evaluate most cloud service fault toleranceand performance improvement solutions pose significant challengesto the analysis and comparison of the effectiveness of these solutions.This thesis precisely addresses this problem and presents a benchmarkingapproach for evaluating the dependability and performance of cloud services.Designing of dependability and performance benchmarks for a cloud serviceis a particular challenge because of high complexity and the large amount ofdata processed by such service. Infrastructure as a Service (IaaS), Platform asa Service (PaaS) and Software as a Service (SaaS) are the three well definedmodels of cloud computing. In this thesis, we will focus on the PaaS modelof cloud computing. PaaS model enables operating systems and middlewareservices to be delivered from a managed source over a network. We introduce ageneric benchmarking architecture which is further used to build dependabilityand performance benchmarks for PaaS model of cloud services
APA, Harvard, Vancouver, ISO, and other styles
11

Andersson, Mattias, and Christopher Ludvigsson. "Cloud Computing : Lärplattform i molnet." Thesis, Uppsala universitet, Institutionen för informatik och media, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155080.

Full text
Abstract:
Cloud computings framväxt har möjliggjort tillhandhållande av datorresurser online och erbjuder två väsentliga egenskaper, dels upplevda oändliga resurser och dels betalning per resursförbrukning. Lärplattformar används idag i stor utsträckning av de svenska universiteten och högskolorna som studieverktyg. Detta medför bättre möjligheter för distanskurser och e-inlärning. Att kombinera cloud computing med en lärplattform är idag möjligt och bör därför ge skolorna fördelar. Om lärplattformen driftas som molntjänst av extern leverantör bör också kraven se annorlunda ut. Syftet med uppsatsen är att utreda om det finns några incitament för att hyra en lärplattform som molntjänst och även att utreda om kraven ser annorlunda ut på en hyrd molntjänst. En fallstudie genomfördes på Uppsala universitet och Högskolan Dalarna, detta för att jämföra en lärplattform installerad på egen server med en lärplattform som hyrd molntjänst. Resultatet av studien bevisar att det finns fördelar med att hyra en lärplattform som molntjänst. Vad gäller kraven är det inte mycket som skiljer, ett viktigt krav när driften ligger hos en leverantör är att det finns en bra dialog och att organisationen litar på leverantören.
The growth of cloud computing has enabled the provision of computer resources online and offers two essential characteristics, illusion of infinite supply and pay-per-use. Learning management systems are currently used extensively by the Swedish universities as learning tools. This brings better opportunities for distance courses and e-learning. To combine cloud computing with a learning management system is now possible and should therefore give the schools benefits. If the Learning management system is hosted as a cloud service by an external provider, so should the requirements be different. The purpose of this paper is to investigate whether there are any incentives for rent a learning management system as a cloud service and also investigate if the requirements are different in a rented cloud service. A case study was conducted at Uppsala University and Dalarnas University, in order to compare a learning management system installed on their own server with a learning management system rented as a cloud service.  The result of the study proves that there are advantages to rent a learning management system as a cloud services. In terms to the requirements, there are no great differences. An important requirement when the learning management system is hosted by a supplier is that there is a good dialogue and that the organization relies on the supplier.
APA, Harvard, Vancouver, ISO, and other styles
12

Chang, He. "Server selection for heterogeneous cloud video services." HKBU Institutional Repository, 2017. http://repository.hkbu.edu.hk/etd_oa/419.

Full text
Abstract:
Server selection is an important problem of cloud computing in which cloud service providers direct user demands to servers in one of the multiple data centers located in different geographical locations. The existing solutions usually assume homogeneity of cloud services (i.e., all users request the same type of service) and handle user demands in an individual basis which incurs high computational overhead. In this study, we propose a new and effective server selection scheme in which diversities of cloud services are taken into account. We focus on a specific cloud service, i.e., online video service, and assume that different videos have different bandwidth requirements. We group users into clusters and handle user demands on a cluster basis for faster and more efficient process. Firstly, we assume that user demands and bandwidth capacities of servers are given in the data centers, our problem is to assign the user demands to the servers under the bandwidth constraint, such that the overall latency (measured by the network distance) between the user clusters and the selected servers is minimized. We design a server selection system and formulate this problem as a linear programming formulation which can be solved by existing techniques. The system periodically executes our scheme and computes an optimal solution for server selection. User demands are assigned to the servers according to the optimal solution and the minimum overall latency can be achieved. The simulation results show that our scheme is significantly better than the random algorithm and the YouTube server selection strategy. Based on the first part, we take the storage capacities of servers constraint into consideration. In the second part, our new problem is to assign the user demands to the servers under the bandwidth and storage constraint, such that the function of overall latency (measured by the network distance) between the user clusters and the selected servers and standard deviation of traffic load of every server in the system is minimized. We design a server selection system and formulate this problem which can be solved by existing techniques. User demands are assigned to the servers according to the optimal solution and the two goals (minimum overall latency and the most balanced traffic load) can be achieved. The simulation results show the influence of different weights of these two goals on the user demands assigning.
APA, Harvard, Vancouver, ISO, and other styles
13

Veber, Jaromír. "Služby cloud computing v České republice." Doctoral thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-165920.

Full text
Abstract:
Modern approaches of providing services such as cloud computing are increasingly used worldwide, and it is a promising way to provide information technology services. Cloud computing promises to increase the efficiency of the management of information technology services, optimize costs and also allows rapid deployment of IT services. The aim of this work is to find where to utilize cloud computing services in the Czech Republic, and how. The objectives were realized through research. Subsequently based on the results of this research there is proposed a model for selecting cloud management solutions for businesses in the Czech Republic. Studies were conducted, among others, in form of a questionnaire survey aimed to analyze the current situation and to deliver data for subsequent analysis of the interaction between the factors that may affect the organization during selection of cloud solutions. Further research was focused on the analysis of the conditions of the Czech Republic in terms of cloud computing and to find differences that distinguish the Czech Republic from other countries around the world. The thesis brings realization of the proposed model that will help organizations to decide whether and how to use cloud services, an overview of the current situation and analysis of the specifics that affect cloud services in the Czech Republic.
APA, Harvard, Vancouver, ISO, and other styles
14

Aloqaily, Moayad. "User Experience-Based Provisioning Services in Vehicular Clouds." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35545.

Full text
Abstract:
Today, the increasing number of applications based on the Internet of Things, as well as advances in wireless communication, information and communication technology, and mobile cloud computing have allowed users to access a wide range of resources while mobile. Vehicular clouds are considered key elements for today’s intelligent transportation systems. They are outfitted with equipment to enable applications and services for vehicle drivers, surrounding vehicles, pedestrians and third parties. As vehicular cloud computing has become more popular, due to its ability to improve driver and vehicle safety and provide provisioning services and applications, researchers and industry have growing interest in the design and development of vehicular networks for emerging applications. Though vehicle drivers can now access a variety of on-demand resources en route via vehicular network service providers, the development of vehicular cloud provisioning services has many challenges. In this dissertation, we examine the most critical provisioning service challenges drivers face, including, cost, privacy and latency. To this point, very little research has addressed these issues from the driver perspective. Privacy and service latency are certainly emerging challenges for drivers, as are service costs since this is a relatively new financial concept. Motivated by the Quality of Experience paradigm and the concept of the Trusted Third Party, we identify and investigate these challenges and examine the limitations and requirements of a vehicular environment. We found no research that addressed these challenges simultaneously, or investigated their effect on one another. We have developed a Quality of Experience framework that provides scalability and reduces congestion overhead for users. Furthermore, we propose two theory-based frameworks to manage on-demand service provision in vehicular clouds: Auction-driven Multi-objective Provisioning and a Multiagent/Multiobjective Interaction Game System. We present different approaches to these, and show through analytical and simulation results that our potential schemes help drivers minimize costs and latency, and maximize privacy.
APA, Harvard, Vancouver, ISO, and other styles
15

Lindgren, Hans. "Performance Management for Cloud Services: Implementation and Evaluation of Schedulers for OpenStack." Thesis, KTH, Kommunikationsnät, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-124542.

Full text
Abstract:
To achieve the best performance out of an IaaS cloud, the resource management layer must be able to distribute the workloads it is tasked with optimally on the underlying infrastructure. A utilization-based scheduler can take advantage of the fact that allocated resources and actual resource usage often differ to make better-informed decisions of where to place future requests. This thesis presents the design, implementation and evaluation of an initial placement controller that uses host utilization data as one of its inputs to help place virtual machines according to one of a number of supported management objectives. The implementation, which builds on top of the OpenStack cloud platform, deals with two different objectives, namely, balanced load and energy efficiency. The thesis also discusses additional objectives and how they can be supported. A testbed and demonstration platform consisting of the aforementioned controller, a synthetic load generator and a monitoring system are built and used during evaluation of the system. Results indicate that the scheduler performs equally well for both objectives using synthetically generated request patterns of both interactive and batch type workloads. A discussion of current limitations of the scheduler and ways to overcome those conclude the thesis. Among the things discussed are how the rate at which host utilization data is collected limits the performance of the scheduler and under which circumstances dynamic placement of virtual machines must be used to complement utilization-based scheduling to avoid the risk of overloading the cloud.
För att erhålla maximal prestanda ur ett IaaS moln måste dess resurshanteringssystem kunna schemalägga resursutnyttjandet av den underliggande infrastrukturen på ett optimalt sätt. En nyttjandebaserad schemaläggare kan dra nytta av det faktum att allokerade resurser och faktiskt använda resurser ofta skiljer sig åt, för att på så sätt kunna fatta mer välgrundade beslut om var framtida förfrågningar skall placeras. Detta examensarbete presenterar såväl utformning, implementation samt utvärdering av en kontrollenhet för initial placering som till sin hjälp använder information om värdutnyttjande som indata för placering av virtuella maskiner enligt ett av ett antal stödda förvaltningssyften. Implementationen, som baseras på molnplattformen OpenStack, behandlar två sådana syften, balanserad last och energieffektivitet. I tillägg diskuteras krav för att stödja ytterligare syften. En testmiljö och demonstrationsplattform, bestående av ovan nämnda kontrollenhet, en syntetisk lastgenererare samt en övervakningsplattform byggs upp och används vid utvärdering av systemet. Resultat av utvärderingen påvisar att schemaläggaren presterar likvärdigt för båda syftena vid användande av last bestående av såväl interaktiva som applikationer av batch-typ. En diskussion om nuvarande begränsningar hos schemaläggaren och hur dessa kan överbryggas sammanfattar arbetet. Bland det som tas upp diskuteras bl.a. hur hastigheten vid vilken värdutnyttjande data samlas in påverkar prestandan hos schemaläggaren samt under vilka förhållanden dynamisk placering av virtuella maskiner bör användas som komplement till nyttjandebaserad schemaläggning för att undvika risk för överbelastning i molnet.
APA, Harvard, Vancouver, ISO, and other styles
16

Winberg, André, and Ramin Alberto Golrang. "Analytics as a Service : Analysis of services in Microsoft Azure." Thesis, Karlstads universitet, Institutionen för matematik och datavetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-47655.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Khan, Zeeshan H. "Exploring Strategies that IT Leaders Use to Adopt Cloud Computing." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/3040.

Full text
Abstract:
Information Technology (IT) leaders must leverage cloud computing to maintain competitive advantage. Evidence suggests that IT leaders who have leveraged cloud computing in small and medium sized organizations have saved an average of $1 million in IT services for their organizations. The purpose of this qualitative single case study was to explore strategies that IT leaders use to adopt cloud computing for their organizations. The target population consisted of 15 IT leaders who had experience with designing and deploying cloud computing solutions at their organization in Long Island, New York within the past 2 years. The conceptual framework of this research project was the disruptive innovation theory. Semistructured interviews were conducted and company documents were gathered. Data were inductively analyzed for emergent themes, then subjected to member checking to ensure the trustworthiness of findings. Four main themes emerged from the data: the essential elements for strategies to adopt cloud computing; most effective strategies; leadership essentials; and barriers, critical factors, and ineffective strategies affecting adoption of cloud computing. These findings may contribute to social change by providing insights to IT leaders in small and medium sized organizations to save money while gaining competitive advantage and ensure sustainable business growth that could enhance community standards of living.
APA, Harvard, Vancouver, ISO, and other styles
18

Nia, Ramadianti Putri Mganga, and Medard Charles. "Enhancing Information Security in Cloud Computing Services using SLA based metrics." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1999.

Full text
Abstract:
Context: Cloud computing is a prospering technology that most organizations are considering for adoption as a cost effective strategy for managing IT. However, organizations also still consider the technology to be associated with many business risks that are not yet resolved. Such issues include security, privacy as well as legal and regulatory risks. As an initiative to address such risks, organizations can develop and implement SLA to establish common expectations and goals between the cloud provider and customer. Organizations can base on the SLA to measure the achievement of the outsourced service. However, many SLAs tend to focus on cloud computing performance whilst neglecting information security issues. Objective: We identify threats and security attributes applicable in cloud computing. We also select a framework suitable for identifying information security metrics. Moreover, we identify SLA based information security metrics in the cloud in line with the COBIT framework. Methods: We conducted a systematic literature review (SLR) to identify studies focusing on information security threats in the cloud computing. We also used SLR to select frameworks available for identification of security metrics. We used Engineering Village and Scopus online citation databases as primary sources of data for SLR. Studies were selected based on the inclusion/exclusion criteria we defined. A suitable framework was selected based on defined framework selection criteria. Based on the selected framework and conceptual review of the COBIT framework we identified SLA based information security metrics in the cloud. Results: Based on the SLR we identified security threats and attributes in the cloud. The Goal Question Metric (GQM) framework was selected as a framework suitable for identification of security metrics. Following the GQM approach and the COBIT framework we identified ten areas that are essential and related with information security in the cloud computing. In addition, covering the ten essential areas we identified 41 SLA based information security metrics that are relevant for measuring and monitoring security performance of cloud computing services. Conclusions: Cloud computing faces similar threats as traditional computing. Depending on the service and deployment model adopted, addressing security risks in the cloud may become a more challenging and complex undertaking. This situation therefore appeals to the cloud providers the need to execute their key responsibilities of creating not only a cost effective but also a secure cloud computing service. In this study, we assist both cloud provider and customers on the security issues that are to be considered for inclusion in their SLA. We have identified 41 SLA based information security metrics to aid both cloud providers and customers obtain common security performance expectations and goals. We anticipate that adoption of these metrics can help cloud providers in enhancing security in the cloud environment. The metrics will also assist cloud customers in evaluating security performance of the cloud for improvements.
APA, Harvard, Vancouver, ISO, and other styles
19

Zambrano, Jesus. "Mobile Cloud Computing: Offloading Mobile Processing to the Cloud." UNF Digital Commons, 2015. http://digitalcommons.unf.edu/etd/594.

Full text
Abstract:
The current proliferation of mobile systems, such as smart phones, PDA and tablets, has led to their adoption as the primary computing platforms for many users. This trend suggests that designers will continue to aim towards the convergence of functionality on a single mobile device. However, this convergence penalizes the mobile system in computational resources such as processor speed, memory consumption, disk capacity, as well as in weight, size, ergonomics and the user’s most important component, battery life. Therefore, this current trend aims towards the efficient and effective use of its hardware and software components. Hence, energy consumption and response time are major concerns when executing complex algorithms on mobile devices because they require significant resources to solve intricate problems. Current cloud computing environments for performing complex and data intensive computation remotely are likely to be an excellent solution for off-loading computation and data processing from mobile devices restricted by reduced resources. In cloud computing, virtualization enables a logical abstraction of physical components in a scalable manner that can overcome the physical constraint of resources. This optimizes IT infrastructure and makes cloud computing a worthy cost effective solution. The intent of this thesis is to determine the types of applications that are better suited to be off-loaded to the cloud from mobile devices. To this end, this thesis quantitatively and qualitatively compares the performance of executing two different kinds of workloads locally on two different mobile devices and remotely on two different cloud computing providers. The results of this thesis are expected to provide valuable insight to developers and architects of mobile applications by providing information on the applications that can be performed remotely in order to save energy and get better response times while remaining transparent to users.
APA, Harvard, Vancouver, ISO, and other styles
20

Aslam, Mudassar. "Bringing Visibility in the Clouds : using Security, Transparency and Assurance Services." Doctoral thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-25376.

Full text
Abstract:
The evolution of cloud computing allows the provisioning of IT resources over the Internet and promises many benefits for both - the service users and providers. Despite various benefits offered by cloud based services, many users hesitate in moving their IT systems to the cloud mainly due to many new security problems introduced by cloud environments. In fact, the characteristics of cloud computing become basis of new problems, for example, support of third party hosting introduces loss of user control on the hardware; similarly, on-demand availability requires reliance on complex and possibly insecure API interfaces; seamless scalability relies on the use of sub-providers; global access over public Internet exposes to broader attack surface; and use of shared resources for better resource utilization introduces isolation problems in a multi-tenant environment. These new security issues in addition to existing security challenges (that exist in today's classic IT environments) become major reasons for the lack of user trust in cloud based services categorized in Software-as-a-Service (SaaS), Platform-as-a-Service (PaaS) or Infrastructure-as-a-Service (IaaS). The focus of this thesis is on IaaS model which allows users to lease IT resources (e.g. computing power, memory, storage, etc.) from a public cloud to create Virtual Machine (VM) instances. The public cloud deployment model considered in this thesis exhibits most elasticity (i.e. degree of freedom to lease/release IT resources according to user demand) but is least secure as compared to private or hybrid models. As a result, public clouds are not trusted for many use cases which involve processing of security critical data such as health records, financial data, government data, etc. However, public IaaS clouds can also be made trustworthy and viable for these use cases by providing better transparency and security assurance services for the user. In this thesis, we consider such assurance services and identify security aspects which are important for making public clouds trustworthy. Based upon our findings, we propose solutions which promise to improve cloud transparency thereby realizing trustworthy clouds. The solutions presented in this thesis mainly deal with the secure life cycle management of the user VM which include protocols and their implementation for secure VM launch and migration. The VM launch and migration solutions ensure that the user VM is always hosted on correct cloud platforms which are setup according to a profile that fulfills the use case relevant security requirements. This is done by using an automated platform security audit and certification mechanism which uses trusted computing and security automation techniques in an integrated solution. In addition to provide the assurance about the cloud platforms, we also propose a solution which provides assurance about the placement of user data in correct and approved geographical locations which is critical from many legal aspects and usually an important requirement of the user. Finally, the assurance solutions provided in this thesis increase cloud transparency which is important for user trust and to realize trustworthy clouds.
APA, Harvard, Vancouver, ISO, and other styles
21

Mahmoud, Wessam Hussein Abdulghani. "Strategies for Cloud Services Adoption in Saudi Arabia." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/7166.

Full text
Abstract:
The adoption rate of cloud computing is low among business organizations in Saudi Arabia, despite the cost-€saving benefits of using cloud services. The purpose of this multiple case study was to explore the strategies that information technology (IT) leaders in the manufacturing industry in Saudi Arabia used to adopt cloud computing to reduce IT costs. The target population of this study consisted of 5 IT leaders from 5 different manufacturing companies in Saudi Arabia who successfully adopted cloud computing in their companies to reduce IT costs. Rogers's diffusion of innovation theory was the conceptual framework for this research. Data collected from face-€to-€face, semistructured interviews and a review of relevant corporate documentation were analyzed using Yin'€™s 5-€step data analysis method, which included compiling, disassembling, reassembling, interpreting, and concluding the data. Five themes emerged from the data analysis: identify business needs and requirements, apply value realization metrics, plan for migration, choose the right cloud service provider, and provide adequate training and awareness sessions. The implications of this study for positive social change include the potential to improve the local economy in Saudi Arabia by ensuring the sustainability of firms in the manufacturing industry through the implementation of cost-€saving strategies associated with cloud computing adoption.
APA, Harvard, Vancouver, ISO, and other styles
22

Benfenatki, Hind. "Méthodologie de provisionnement automatique d’applications métier orientées service sur les environnements cloud." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1282/document.

Full text
Abstract:
Le développement orienté-service et le cloud computing offrent beaucoup d'opportunités au développement et au déploiement d'applications. En effet, le développement orienté-service permet de composer des fonctionnalités issues de services distribués, développés par différentes organisations. D'un autre côté, le cloud computing permet de provisionner des environnements évolutifs (en fonction du besoin en ressources) de développement et de déploiement, à la demande. Dans ce travail de recherche, nous proposons et décrivons une méthode de provisonnement automatique d'applications métier, orientées-service sur le cloud. Nous avons appelé cette méthode MADONA (Method for AutomateD prOvisioning of service-oriented busiNess Applications). MADONA couvre le cycle de vie de provisionnement d'applications et est basée sur un orchestrateur de services pour la gestion de la configuration, du déploiement, et de la composition de services métier.Dans ce travail, nous visons à réduire les connaissances techniques nécessaires au provisionnement d'applications métier. Pour ce faire, nous apportons trois contributions majeures. Premièrement, l'automatisation de ce provisionnement. En effet, les phases de MADONA sont complètement automatisées. L'utilisateur n'intervient que pour exprimer son besoin et pour utiliser l'application métier automatiquement générée (par la composition de services métier) et déployée sur une IaaS présélectionnée. Deuxièmement, l'enrichissement de la description des services par des concepts liés aux relations d'un service. En effet, les langages de description de services décrivent le plus souvent ces derniers comme des entités isolées et ne considèrent pas les relations entre services. Nous avons défini dans ce travail les relations de composition qui décrivent pour chaque service métier les services nécessaires à son bon fonctionnement, et les services avec lesquels il peut être composé.Troisièmement, nous permettons à l'utilisateur d'exprimer son besoin à un haut niveau d'abstraction des détails techniques de composition et de déploiement. Nous avons pour cela défini un vocabulaire pour formaliser ces besoins fonctionnels (en termes de mots clés décrivant les fonctionnalités désirées, ou de noms de services désirés) et non fonctionnels (en termes de coût, de préférences de déploiement (ex : localisation de déploiement), et de qualité de service). La méthode a été prototypée et testée suivant plusieurs scénarios montrant sa faisabilité
Service-oriented computing and cloud computing offer many opportunities for developing and deploying applications. In fact, service-oriented computing allows to compose several functionalities from distributed services developed by different organizations. On the other hand, cloud computing allows to provision on demand scalable development and deployment environments. In this resarch work, we propose and describe a Method for AutomateD prOvisioning of service-oriented cloud busiNess Applications (MADONA). The method covers the whole application’s lifecycle and is based on cloud orchestration tools that manage the deployment and dependencies of supplied components. This research work aims to reduce the necessary technical knowledge for provisioning service-oriented cloud applications. To this end, we bring three major contributions. Firstly, we automatise the whole application provisioning. In fact, MADONA phases are fully automated. The user intervenes only in requirement elicitation and when the application is deployed and ready to use. The business application is automatically generated (by composing business services) and deployed in an automatically preselected IaaS. Secondly, we enrich the description of services by integrating concepts describing services’ interactions. In fact, service description languages usually describe services as isolated components and does not consider the interactions between services. We define in this work, composition interactions which describe for each business service, its necessary services and the services with which it can be composed. Thirdly, we allow the user to express her requirements abstracting composition and deployment technical details. To this end, we defined a RequIrement VocAbuLary (RIVAL) to formalize user’s functional (in terms of keywords describing the desired functionalities, or names of desired services) and non-functional requirements (in terms of cost, deployment preferences (ex. preferred location), and quality of service). The method has been implemented and tested showing its faisability
APA, Harvard, Vancouver, ISO, and other styles
23

Larson, Bridger Ronald. "Selecting Cloud Platform Services Based On Application Requirements." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6129.

Full text
Abstract:
As virtualization platforms or cloud computing have become more of a commodity, many more organizations have been utilizing them. Many organizations and technologies have emerged to fulfill those cloud needs. Cloud vendors provide similar services, but the differences can have significant impact on specific applications. Selecting the right provider is difficult and confusing because of the number of options. It can be difficult to determine which application characteristics will impact the choice of implementation. There has not been a concise process to select which cloud vendor and characteristics are best suited for the application requirements and organization requirements. This thesis provides a model that identifies crucial application characteristics, organization requirements and also characteristics of a cloud. The model is used to analyze the interaction of the application with multiple cloud platforms and select the best option based on a suitability score. Case studies utilize this model to test three applications against three cloud implementations to identify the best fit cloud implementation. The model is further validated by a small group of peers through a survey. The studies show that the model is useful in identifying and comparing cloud implementations with regard to application requirements.
APA, Harvard, Vancouver, ISO, and other styles
24

Lucernati, Romano. "Scalable and Seamless Discovery and Selection of Services in Mobile Cloud Computing." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

Find full text
Abstract:
Mobile devices are now capable of supporting a wide range of applications, many of which demand an ever increasing computational power. To this end, mobile cloud computing (MCC) has been proposed to address the limited computation power, memory, storage, and energy of such devices. An important challenge in MCC is to guarantee seamless discovery of services. To this end, this thesis proposes an architecture that provides user-transparent and low-latency service discovery, as well as automated service selection. Experimental results on a real cloud computing testbed demonstrated that the proposed work outperforms state of-the-art approaches by achieving extremely low discovery delay.
APA, Harvard, Vancouver, ISO, and other styles
25

Silva, Jefferson de Carvalho. "A framework for building component-based applications on a cloud computing platform for high performance computing services." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16543.

Full text
Abstract:
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior
Developing High Performance Computing applications (HPC), which optimally access the available computing resources in a higher level of abstraction, is a challenge for many scientists. To address this problem, we present a proposal of a component computing cloud called HPC Shelf, where HPC applications perform and SAFe framework, a front-end aimed to create applications in HPC Shelf and the author's main contribution. SAFe is based on Scientific Workflows Management Systems (SWMS) projects and it allows the specification of computational solutions formed by components to solve problems specified by the expert user through a high level interface. For that purpose, it implements SAFeSWL, an architectural and orchestration description language for describing scientific worflows. Compared with other SWMS alternatives, besides rid expert users from concerns about the construction of parallel and efficient computational solutions from the components offered by the cloud, SAFe integrates itself to a system of contextual contracts which is aligned to a system of dynamic discovery (resolution) of components. In addition, SAFeSWL allows explicit control of life cycle stages (resolution, deployment, instantiation and execution) of components through embedded operators, aimed at optimizing the use of cloud resources and minimize the overall execution cost of computational solutions (workflows). Montage and Map/Reduce are the case studies that have been applied for demonstration, evaluation and validation of the particular features of SAFe in building HPC applications aimed to the HPC Shelf platform.
Desenvolver aplicaÃÃes de ComputaÃÃo de Alto Desempenho (CAD), que acessem os recursos computacionais disponÃveis de forma otimizada e em um nÃvel maior de abstraÃÃo, à um desafio para cientistas de diversos domÃnios. Esta Tese apresenta a proposta de uma nuvem de componentes chamada HPC Shelf, pano de fundo onde as aplicaÃÃes CAD executam, e o arcabouÃo SAFe, Front-End para criaÃÃo de aplicaÃÃes na HPC Shelf e contribuiÃÃo principal do autor. O SAFe toma como base o projeto de sistemas gerenciadores de workflows cientÃficos (SGWC), permitindo a implementaÃÃo de soluÃÃes computacionais baseadas em componentes para resolver os problemas especificados por meio de uma interface de nÃvel de abstraÃÃo mais alto. Para isso, foi desenvolvido o SAFeSWL, uma linguagem de descriÃÃo arquitetural e orquestraÃÃo de worflows cientÃficos. Comparado com outros SGWC, alÃm de livrar usuÃrios finais de preocupaÃÃes em relaÃÃo à construÃÃo de soluÃÃes computacionais paralelas e eficientes a partir dos componentes oferecidos pela nuvem, o SAFe faz uso de um sistema de contratos contextuais integrado a um sistema de descoberta (resoluÃÃo) dinÃmica de componentes. A linguagem SAFeSWL permite o controle explÃcito das etapas do ciclo de vida de um componente em execuÃÃo (resoluÃÃo, implantaÃÃo, instanciaÃÃo e execuÃÃo), atravÃs de operadores embutidos, a fim de otimizar o uso dos recursos da nuvem e minimizar os custos de sua utilizaÃÃo. Montage e Map/Reduce constituem os estudos de caso aplicados para demonstraÃÃo e avaliaÃÃo das propriedades originais do SAFe e do SAFeSWL na construÃÃo de aplicaÃÃes de CAD.
APA, Harvard, Vancouver, ISO, and other styles
26

Meinel, Christoph, Maxim Schnjakin, Tobias Metzke, and Markus Freitag. "Anbieter von Cloud Speicherdiensten im Überblick." Universität Potsdam, 2014. http://opus.kobv.de/ubp/volltexte/2014/6878/.

Full text
Abstract:
Durch die immer stärker werdende Flut an digitalen Informationen basieren immer mehr Anwendungen auf der Nutzung von kostengünstigen Cloud Storage Diensten. Die Anzahl der Anbieter, die diese Dienste zur Verfügung stellen, hat sich in den letzten Jahren deutlich erhöht. Um den passenden Anbieter für eine Anwendung zu finden, müssen verschiedene Kriterien individuell berücksichtigt werden. In der vorliegenden Studie wird eine Auswahl an Anbietern etablierter Basic Storage Diensten vorgestellt und miteinander verglichen. Für die Gegenüberstellung werden Kriterien extrahiert, welche bei jedem der untersuchten Anbieter anwendbar sind und somit eine möglichst objektive Beurteilung erlauben. Hierzu gehören unter anderem Kosten, Recht, Sicherheit, Leistungsfähigkeit sowie bereitgestellte Schnittstellen. Die vorgestellten Kriterien können genutzt werden, um Cloud Storage Anbieter bezüglich eines konkreten Anwendungsfalles zu bewerten.
Due to the ever-increasing flood of digital information, more and more applications make use of cost-effective cloud storage services. The number of vendors that provide these services has increased significantly in recent years. The identification of an appropriate service provider requires an individual consideration of several criteria. This survey presents a comparison of some established basic storage providers. For this comparison, several criteria are extracted that are applicable to any of the selected providers and thus allow for an assessment that is as objective as possible. The criteria include factors like costs, legal information, security, performance, and supported interfaces. The presented criteria can be used to evaluate cloud storage providers in a specific use case in order to identify the most suitable service based on individual requirements.
APA, Harvard, Vancouver, ISO, and other styles
27

Nordlindh, Mattias, and Kristoffer Suber. "Vad är Cloud Computing? : En kvalitativ studie ur ett företagsperspektiv." Thesis, Uppsala University, Computer Systems Sciences, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-126891.

Full text
Abstract:

Cloud computing is a new buzzword within the IT-industry, and introduces a whole new way of working with IT. The technique delivers web based services, which results in that the user no longer needs to install an application locally on a computer. Since the application no longer needs to run on a local entity, but in a datacenter located on a service provider, the users no longer need any specific hardware more than a computer with an internet connection. Cloud computing also offers IT-infrastructure and development environments as services, these three service types is better known as cloud services. Through the usage of different types of cloud services, the need for maintenance and hardware is significantly reduced. Therefore, the need for IT-competence in a company is reduced, which offers the company to focus on their core business strategy. A problem with cloud computing is that because it is such a new phenomenon, there is no established definition. This makes the subject hard to understand and easily misunderstood.

Cloud computing surely seems to solve many of the problems with reliability of systems and hardware that companies struggle with on a daily basis, but is it really that simple? The purpose of this thesis is to understand which types of company preconditions that affect the integration of cloud services in a company. We will also clarify the concept of Cloud computing by divide and describe its different components.

To investigate the different types of company preconditions and there approach to cloud services we have performed interviews at different companies in associations with our case study.

The result shows that a cloud service only can be integrated to an organization as long as the organization possesses the right preconditions. We think that cloud services can bring great advantages to organizations that meet these preconditions and that cloud services has the potential to ease the way of work for organizations in the future.


Cloud computing är ett nytt trendord inom IT-branschen och innebär ett nytt sätt att arbeta med IT. Tekniken bygger på att användare av en applikation inte behöver installera en applikation på sin lokala dator utan applikationen förmedlas som en tjänst genom Internet. Då applikationen inte körs på någon lokal enhet utan i en datorhall hos tjänsteleverantören behöver inte användaren ha någon mer specifik hårdvara utöver en dator och en Internetanslutning för att ta del av tjänsten. Även IT-infrastruktur och utvecklingsmiljö som tjänst erbjuds på samma sätt inom Cloud computing, dessa tre typer av tjänster kallas för molntjänster. Genom att använda olika typer av molntjänster minskar den interna driften av system, underhåll av hårdvara och således behövs minmal IT-kompetens inom företag, detta tillåter företag att fokusera på sin kärnverksamhet. Då Cloud computing är ett nytt fenomen finns det ingen erkänd definition av begreppet ännu, detta resulterar i att ämnet blir svårförstått och misstolkas lätt.

Cloud computing verkar onekligen lösa problematiken med driftsäkerhet som företag tvingas att handskas med dagligen, men är de verkligen så enkelt? Syftet med uppsatsen är att redogöra för vilka förutsättningar som företag besitter som påverkar hur bra olika typer av molntjänster kan integreras i företagets verksamhet. Uppsatsen ska även redogöra för begreppet Cloud computing genom att dela upp och beskriva de olika delar som begreppet består utav.

För att utreda detta har vi bedrivit en fallstudie genom intervjuer hos utvalda företag för att undersöka företagens förutsättningar och förhållningssätt gentemot olika typer av molntjänster.

Resultatet visar att de rätta förutsättningarna krävs för att ett företag ska kunna integrera molntjänster i sin verksamhet. Vi anser att molntjänster kan medföra stora fördelar för de företagen som besitter dessa förutsättningar, och att molntjänster har potential att underlätta verksamheten för många organisationer i framtiden.

APA, Harvard, Vancouver, ISO, and other styles
28

Werlinder, Marcus, and Emelie Tham. "Application of Amazon Web Services in software development." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231917.

Full text
Abstract:
During these last recent years cloud computing and cloud services have started to gain traction, which has been most notable among companies. Amazon have proven to be one of the powerhouses on providing scalable and flexible cloud computing services. However, cloud computing is still a relatively new area. From an outsider’s point of view, the overwhelming information and available services might prove to be difficult to familiarize with. The aim of this thesis is to explore how Amazon Web Services can be applied during software development and observing how difficult it might be to use these services. Three test applications that utilized different Amazon Web Services were implemented to get an insight into how Amazon Web Services can be applied from a cloud computing beginner’s point of view. These applications were developed in an iterative manner, where a case study was performed on each application. At the start of each new iteration a literature study was conducted, where sources were reviewed to see if it provided essential information. In total, nine different Amazon Web Services were used to implement and test the three respective test applications. Results of the case study were interpreted and evaluated with regards to the learnability and appliance of Amazon Web Services. Issues that were identified during the development process showed that Amazon Web Services were not userfriendly for users that have little to no experience with cloud computing services. Further research on other Amazon Web Services, such as Elastic Cloud Computing, as well as other cloud computing platforms like Google or IBM, may provide a deeper and more accurate insight on the appliances of cloud computing.
Under dem senaste åren så har molntjänster blivit ett allt mer populärt område, speciellt inom företag. Ett av dem största utgivare inom molntjänst branschen är Amazon som erbjuder skalbara och flexibla molntjänster. Molntjänster är dock ett relativt nytt område, vilket innebär att någon som inte är insatt i ämnet kan finna all tillgänglig information överväldigande och svår att bekanta sig med. Målet med det här tesen är att utforska olika Amazon Web Service som kan användas inom mjukvaruutveckling och observera problem som kan uppstå med dessa tjänster. Tre testapplikationer som använde sig av Amazon Web Services var skapade för att få en fördjupad kunskap om hur dessa tjänster fungerar och vad för möjligheter de har. Dessa applikationer utvecklades iterativt och en fallstudie utfördes för varje applikation. I början av varje ny iteration genomfördes en litteraturstudie, där källorna var kritiskt granskade för att se ifall dem innehöll väsentlig information för tesen. Sammanlagt användes nio olika Amazon Web Services för att implementera och testa de tre olika testapplikationerna. Resultaten från fallstudien tolkades och utvärderades med avseende på Amazon Web Services lärbarhet och tillämpningsbarhet. Problem som samlades ihop under utvecklingsprocessen visade att Amazons Web Services inte var särskilt användarvänligt för utvecklare med liten eller ingen erfarenhet inom Amazon Web Services. Ytterligare forskning inom andra Amazon Web Services som Elastic Cloud Computing och forskning som undersöker andra molntjänst plattformar som Google Cloud, skulle kunna bidra med en djupare förståelse och mer exakt inblick kring tillämpning av molntjänster.
APA, Harvard, Vancouver, ISO, and other styles
29

Leon, Franck. "La construction des Business Models des fournisseurs de services d'infrastructure Cloud Computing (IaaS)." Thesis, Nice, 2015. http://www.theses.fr/2015NICE0006/document.

Full text
Abstract:
L’émergence du Cloud Computing change le paysage des infrastructures qui soutiennent les systèmes informatiques. L’originalité du Cloud Computing réside avant tout dans l’offre d’un nouveau mode de consommation proposé aux clients: les ressources informatiques en tant que service à la demande. Les fournisseurs de "hardware" et de "software" qui ont historiquement fondé leurs revenus sur la vente de produits matériels et de licences logiciels ont fait face à un changement de leurs modèles de revenus, et donc à considérer de nouveau Business Models. Ce travail révèle que les fournisseurs de services d’infrastructure Cloud Computing se définissent comme étant des opérateurs Cloud. Ils ont un rôle d’agrégateur de service et proposent des services d’infrastructures fonctionnelles, disponible à la demande et accessible à distance. Ces fournisseurs construisent un écosystème de partenaires-fournisseurs et un écosystème de partenaires-produits pour accroitre la valeur ajoutée globale. La garantie de niveau de service (SLA) devient l’objet de la transaction entre le fournisseur et le client. Ce dernier se décharge de toutes les problématiques techniques, et les transfère au fournisseur lors de la signature du contrat. Lors de la fixation des prix, une hypothèse de taux d’usage est prise en compte et sera à la base des calculs des coûts. Nous proposons alors trois leviers d’actions aux fournisseurs d’infrastructure Cloud Computing pour accroître leur part de valeur ajoutée : (1) la baisse des coûts par l’innovation technologique, (2) la capacité d’attirer et de garder les clients pour avoir un taux d’usage élevé, et (3) le développement d’un écosystème de services
The emergence of cloud computing is changing the landscape of the infrastructure supporting IT systems. The originality of cloud computing lies primarily in the offer of a new consumption mode available to consumers: IT resources as a service provided on demand. IT providers that have based their income from products sales (hardware and software licenses) faced a change in their revenue models, and thus have to consider new business models. This research reveals that IaaS provider is defined as cloud operators. They are service aggregator and offer functional infrastructure available on demand available over the network. IaaS providers are building a supplier-partners and product-partners ecosystems to increase the overall value. When consumers sign contract, they declaim all technical issues by transferring them to providers. Service Level Agreement (SLA) becomes the object of transaction between providers and consumers. For the pricing process, rate of use is the basis of cost assessment. We suggest three leverage to IaaS providers in order to increase their share of value added: (1) lower costs through technological innovation, (2) ability to attract and retain customers to have high rate of use, and (3) development of services ecosystem
APA, Harvard, Vancouver, ISO, and other styles
30

Siddiqui, Muhammad Anas. "Cloud Computing : Evaluation, as a platform for Scania Architecture." Thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-18896.

Full text
Abstract:
Cloud computing has been given a great deal of attention during recent years. Almost all the technology market leaders and leading hosting service providers (like IBM, Microsoft and Verizon) have entered into the Cloud market as Cloud Providers. Cloud computing promises to provide highly available, secure, low cost, agile and highly scalable solution to the consumers. Scania is a global company and one of the world’s leading heavy vehicle manufacturers with 35,000+ employees. All the large organizations such as Scania, aim to constantly update themselves with the latest technology in order to meet their business requirements but, these organizations must always be convinced that there is a strong reason(s) to implement new technology. This research provides the method and criteria in relation to initiating Cloud computing. A number of Scania’s specific business requirements that it is possible to map to the Cloud are addressed in this thesis. The methodology of research is split in two parts. Firstly, the identification of business cases at Scania and their requirements with the Cloud and Secondly, the evaluation and comparison of the functionalities and capabilities of different vendors. The accumulated data is then compared and suitable vendors, according to those business requirements are suggested. This thesis also shares the experience of moving on premise applications to the Cloud. These are Scania specific applications which are currently being hosted in-house. The research also addresses the possibilities of portability between the Cloud providers. Although there is no standardization in relation to Cloud computing, some initiatives such as OpenStack are available and its current position and some application and data migration tools are also discussed. The thesis concludes with a general discussion, recommendations in relation to adapting Cloud computing and selecting the Cloud provider. This recommendation applies to every organization including Scania.
APA, Harvard, Vancouver, ISO, and other styles
31

Chiza, Albin Boris Lugerero. "Adoption of cloud computing services amongst the micro-enterprise sector in Cape Town." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2862.

Full text
Abstract:
Thesis (MTech (Business Information Systems))--Cape Peninsula University of Technology, 2018.
Micro-enterprises play a vital role towards the South Africa’s economic growth by contributing towards job creation. Despite the importance of the role of micro-enterprises, micro-enterprises face several challenges such as lack of finance, lack of skilled workers and lack of technological resources. Previous studies indicate that Information Technology has a distinct role in assisting micro-enterprises overcome several challenges. It is further evidenced in the extant literature that cloud computing, provides a low cost entry for enterprises to support several facets of their business operations. In the current era cloud computing requires a constant as well as fast internet connection and the South African government has various interventions to address the infrastructure divide. However, we have a scant understanding of the adoption challenges amongst micro-enterprises to adopt cloud solutions, which to date feature more prominently amongst larger organisations. This research investigated the factors that influence cloud computing adoption in the micro-enterprise sector in Cape Town. This is a city that promotes the contribution of micro-enterprises to their economic activity, and was such an ideal location to investigate cloud computing adoption amongst the micro-enterprise sector. This research provides a rich understanding of the factors that influence micro-enterprises in Cape Town to adopt cloud computing services and proposes guidelines to encourage micro-enterprises in Cape Town to use cloud services to improve their productivity. The researcher uses the UTAUT model as a framework and a qualitative research methodology to investigate the research question. Data for this research study was collected via face to face interviews with semi-structured questions of ten micro-enterprises and an IT expert. The findings showed that the factors influencing the adoption of cloud computing services are performance expectancy, effort expectancy, social influence, facilitating conditions, lack of training, cost efficiency and reduction of working hours.
APA, Harvard, Vancouver, ISO, and other styles
32

Piscaglia, Alex. "Mobile Cloud Computing: una panoramica e un caso di studio." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17989/.

Full text
Abstract:
Il cloud computing è un trend tecnologico che, da diversi anni a questa parte, sta rivoluzionando il modo di pensare e agire nel mondo dell'informatica. Se, comunemente, si è soliti immaginare un software in modalità on-premise, ovverosia installato ed eseguito direttamente sulla macchina locale, con il cloud computing questa mentalità viene meno: le applicazioni non hanno più la necessità di trovarsi fisicamente sul computer dell'utente, poiché vengono messe a disposizione via Internet attraverso una piattaforma virtuale e, tipicamente, ospitata e gestita da un fornitore di terze parti, risultando accessibili da qualsiasi terminale dotato di una connessione alla rete. Come vedremo nel corso dell'elaborato, questa soluzione non si applica soltanto ai software, bensì anche alle infrastrutture e piattaforme hardware. Il termine "cloud", nuvola in inglese, è molto azzeccato, in quanto esprime bene il concetto che sta alla base del paradigma: così come una nuvola si trova in cielo ed è visibile da molteplici posizioni, allo stesso modo il cloud "si trova" in rete ed è accessibile da vari device. Lo scopo di questa tesi è quello approfondire lo studio su questa frontiera dell'informatica, fornendo una descrizione più dettagliata dei vari aspetti teorici e mettendoli successivamente in pratica attraverso l'implementazione di un caso di studio.
APA, Harvard, Vancouver, ISO, and other styles
33

Gantzia, Danai, and Maria Eleni Sklatinioti. "Cloud computing in the 3PL industry. A profound insight into the benefits & challenges of cloud-based services: A two fold approach." Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Centre of Logistics and Supply Chain Management, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-24135.

Full text
Abstract:
Problem: Practical industry advancements associated with cloud computing in the contextof supply chain rapidly proliferate. However, there is a lack of academic research that investigatesthe application of this technology from a theoretical standpoint. A significantpart of the literature explores the perceived advantages and disadvantages related to the decision-making process of the adoption of the specific technology, rather than the perceivedbenefits and challenges when the cloud has been already adopted and used. Furthermore,absent from the literature is a thorough understanding of the cloud-based applications inthe industry of 3PLs, and the perceived benefits and challenges not only from the userχsside but from the supply side as well. The research is limited referring to critical aspects ofcloud computing applied on 3PLs within a theoretical basis. Thus, in this study, the authorsaim at filling these gaps by exploring what types of cloud-based services are applied on3PLs, what are the perceived benefits and challenges from the 3PLs perspective as well asfrom their cloud providers/IT companies. Purpose: The purpose of this thesis is to investigate what cloud-based services are used inthe 3PL industry as well as the challenges and benefits perceived by the cloud providers of3PL firms and by the 3PL firms that use this technology. In order to gain a thorough understandingof this usage and grasp the full picture within the focal industry, the research isfocusing on the perspectives of three cloud providers and three 3PLs that use and/or providecloud based services. Method: : This is a qualitative study. The authors are making use of a case study strategywith six investigated companies. The majority of the data is gathered from semi-structuredinterviews, while documentary secondary data concerning basic companiesχ information,have been collected as well. The analysis of the findings is based on the revision of the settedapriori codes by the authors. A cross-analysis between 3PLs and cloud providers ofthose firms is being conducted in order to identify the perceived challenges and benefits ofcloud by both, within the 3PL industry. Conclusion: The findings of this thesis demonstrate Software as a Service (SaaS) and moreprecisely, transportation administration (TA) software, as the most prevailing cloud-basedsystem applied in the 3PL industry nowadays. It has been revealed that 3PLs benefit fromcloud technology in terms of cost savings, strategic flexibility, access to leading-edge IT resourcesand security, whereas the challenges faced are related to performance and strategicaspect. Furthermore, the authors identify and propose the different phases of cloud computingimplementation in the 3PL sector. Lastly, a model of perceived challenges and benefitsof cloud in 3PLs firms has been compiled and presented.
APA, Harvard, Vancouver, ISO, and other styles
34

Mardosas, Jonas. "Virtualizacijos technologijų pritaikymas debesyje (Cloud)." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20110709_152457-77582.

Full text
Abstract:
Šiame darbe aprašomos technologijos naudojamos debesų kompiuterijos platformose. Pilnai išanalizuojama nemokama debesies platforma Eucalyptus. Bandoma sukurti internetinių puslapių talpinimo paslaugą debesyje (PaaS paslauga), kuria naudotis galėtų daug vartotojų. Taip pat sudaromas planas kaip galėtų atrodyti panašių paslaugų perkėlimas į debesies infrastruktūras. Išnagrinėjus, kokios programinės įrangos reikia tokiai paslaugai teikti, paruošti pavyzdiniai instaliaciniai skriptai, nubraižytos schemos kaip tokia paslauga galėtų veikti ir kokias funkcijas, bei kokią naudą gauna galutinis vartotojas naudodamas tokią paslaugą. Suprojektuota sistema, kuri automatiškai turi rūpintis tokios paslaugos valdymu, bei stebėjimu. Pateikti tokios automatizuotos sistemos kodo pavyzdžiai.
This document describes the technologies used in cloud computing platforms. Also this work completely analyze cloud open free platform Eucalyptus. On this platform trying to create a web page hosting service in the cloud as a PaaS service, which could be used of many users. Also work describes the plan/scheme as it might be possible to transfer similiar services to the cloud infrastructure. Examination of which software must be provided the following services, preparing model system installation scripts, either as a scheme for such a service can operate and what functions and what benefits the final consumer gets using this service. Designed a system that automatically can provide such a service management and monitoring. Shows such an automated system code examples.
APA, Harvard, Vancouver, ISO, and other styles
35

Khan, Kafeel Ahmed. "Web-based Management of Fog Computing Services implemented in Docker." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18934/.

Full text
Abstract:
The aim and motivation of this thesis project is to introduce the implementation of the Fog computing scenario. For possible demonstration, we use the feasible or concur solution already deployed in the cloud computing paradigm. An emerging trend of IoT in the current era required more development in cloud computing due to the centralized control of resources that is no-more beneficial in the IoT base scenario. A distributed base approach called Fog computing is introduced that manages the services without being the use of a centralized pool of cloud. Although, Fog cannot fully function without being centralized control. But in order to implement the Fog node, I used a hypervisor supported device to configure virtual machines on the server and considered it as edge or fog node and make it capable to hold Fog services. Further, I used the docker container orchestration tool configure along with the Apache server that can host webpages to interact with the Docker API support and last a local machine that is used to access the fog node by a browser. Further, I analyze the response time of on-demand service with respect to the number of containers and conclude that using Fog as an intermittent node reduces the overall container formation time as compared to those users that directly connect with the cloud server this approach can fulfill some level of latency requirement by IoT devices.
APA, Harvard, Vancouver, ISO, and other styles
36

Guenther, Andrew. "ARTS and CRAFTS: Predictive Scaling for Request-based Services in the Cloud." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1261.

Full text
Abstract:
Modern web services can see well over a billion requests per day. Data and services at such scale require advanced software and large amounts of computational resources to process requests in reasonable time. Advancements in cloud computing now allow us to acquire additional resources faster than in traditional capacity planning scenarios. Companies can scale systems up and down as required, allowing them to meet the demand of their customers without having to purchase their own expensive hardware. Unfortunately, these, now routine, scaling operations remain a primarily manual task. To solve this problem, we present CRAFTS (Cloud Resource Anticipation For Timing Scaling), a system for automatically identifying application throughput and predictive scaling of cloud computing resources based on historical data. We also present ARTS (Automated Request Trace Simulator), a request based workload generation tool for constructing diverse and realistic request patterns for modern web applications. ARTS allows us to evaluate CRAFTS' algorithms on a wide range of scenarios. In this thesis, we outline the design and implementation of both ARTS and CRAFTS and evaluate the effectiveness of various prediction algorithms applied to real-world request data and artificial workloads generated by ARTS.
APA, Harvard, Vancouver, ISO, and other styles
37

Drolia, Utsav. "Adaptive Distributed Caching for Scalable Machine Learning Services." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1004.

Full text
Abstract:
Applications for Internet-enabled devices use machine learning to process captured data to make intelligent decisions or provide information to users. Typically, the computation to process the data is executed in cloud-based backends. The devices are used for sensing data, offloading it to the cloud, receiving responses and acting upon them. However, this approach leads to high end-to-end latency due to communication over the Internet. This dissertation proposes reducing this response time by minimizing offloading, and pushing computation close to the source of the data, i.e. to edge servers and devices themselves. To adapt to the resource constrained environment at the edge, it presents an approach that leverages spatiotemporal locality to push subparts of the model to the edge. This approach is embodied in a distributed caching framework, Cachier. Cachier is built upon a novel caching model for recognition, and is distributed across edge servers and devices. The analytical caching model for recognition provides a formulation for expected latency for recognition requests in Cachier. The formulation incorporates the effects of compute time and accuracy. It also incorporates network conditions, thus providing a method to compute expected response times under various conditions. This is utilized as a cost function by Cachier, at edge servers and devices. By analyzing requests at the edge server, Cachier caches relevant parts of the trained model at edge servers, which is used to respond to requests, minimizing the number of requests that go to the cloud. Then, Cachier uses context-aware prediction to prefetch parts of the trained model onto devices. The requests can then be processed on the devices, thus minimizing the number of offloaded requests. Finally, Cachier enables cooperation between nearby devices to allow exchanging prefetched data, reducing the dependence on remote servers even further. The efficacy of Cachier is evaluated by using it with an art recognition application. The application is driven using real world traces gathered at museums. By conducting a large-scale study with different control variables, we show that Cachier can lower latency, increase scalability and decrease infrastructure resource usage, while maintaining high accuracy.
APA, Harvard, Vancouver, ISO, and other styles
38

Marchão, Joaquina Maria Olivença Andrade Lemos. "Os serviços em cloud na ótica de utilização empresarial: um estudo de viabilidade." Master's thesis, Escola Superior de Ciências Empresariais, 2012. http://hdl.handle.net/10400.26/4370.

Full text
Abstract:
Dissertação de Mestrado em Sistemas de Informação Organizacionais
O conceito de Cloud Computing tem evoluído na vertente de modelos de serviços baseados numa pool de recursos tecnológicos. Estão disponíveis por subscrição através da internet. Utiliza-se a tecnologia de virtualização para otimização dos recursos, os quais são partilhados por todos os clientes, num formato de self-service. Desta característica resulta um comportamento elástico e escalável dos recursos. A gestão do serviço disponibilizado efetua-se em função do acordo de níveis de serviço estabelecido entre cliente e o fornecedor de Cloud. Procurámos analisar a viabilidade da adoção deste conceito na ANA, Aeroportos através de duas perspectivas: utilização de serviços de gestão e arquivo do correio eletrónico em infraestrutura do fornecedor (Public Cloud), e virtualização de ambiente de trabalho desktop em servidores de Datacenter interno (Private Cloud). Recorremos à metodologia exploratória e descritiva através de revisão de literatura, observação direta, reuniões internas informais e contactos com fornecedores. Constatou-se que cada fornecedor adequa os modelos de negócio à sua especialidade, originando um mercado muito heterogéneo e de difícil análise comparativa dos serviços oferecidos. Para serviços de gestão e armazenamento de correio electrónico, os serviços em Cloud do fornecedor proporcionam: maior controlo dos custos, gestão mais eficiente e mais capacidade disponível para armazenamento da informação. Para os ambientes de trabalho, defendem-se soluções centralizadas de virtualização de desktops em servidores internos de Datacenter que possibilitem aceder ao ambiente de trabalho a partir de um qualquer computador disponível no interior da organização. Este é um tema transfronteiriço, imaturo e em rápida evolução, colocando desafios a vários níveis. No aspeto tecnológico os desafios relacionam-se essencialmente com a interoperacionalidade de soluções dos diferentes fornecedores e a largura de banda disponível para comunicações. Normalização a nível regulatório é outro importante desafio. As principais conclusões apontam para a realização de protótipos que avaliem no terreno a viabilidade das soluções propostas. No aspeto contratual a ressalva vai para o cuidado na escolha do fornecedor e na contratualização de níveis de serviços adequados.
The concept of cloud computing is related to service models. Those services are based on a pool of technological resources and they are available by subscription over the internet. The resources are optimized through virtualization technology and shared by all customers in a self-service format. This feature results in a scalable and elastic behavior on resources. The service provided is managed in order to meet the service level agreement established between client and the cloud provider. We tried to analyze the feasibility of adoption of this concept in ANA airports through two perspectives: email archiving services in the provider’s infrastructure (Public Cloud), and virtualization desktop managed in internal servers located in the enterprise’s Datacenter (Private Cloud). We use exploratory and descriptive methodology, with literature review, direct observation, internal meetings and informal contacts with providers. We found a market very heterogeneous. Each provider makes business models suited to their specialty. It was difficult to compare services offered. The email archiving services in a Cloud provider gives a greater control of costs, more efficiency and more space for archiving. For desktops, hosted desktop virtualization solutions in the enterprise datacenter were the choice, allowing access to the desktop environment from any computer available within the organization. Cloud Computing is a global paradigm, without boundary, immature and in quick development, presenting challenges at various levels. In the technological aspect challenges are related to the interoperability of solutions from different providers and an available bandwidth for communications. Standardization at the regulatory is another important challenge. The conclusions lead to the realization of prototypes to assess in the field the feasibility of proposed solutions. In the contractual aspect the focus goes to the careful choice of the provider and the contract of appropriate service levels.
APA, Harvard, Vancouver, ISO, and other styles
39

Setiawan, Abraham. "The Impact of Cloud Computing Towards Early Stage Startups in Sweden : Case of Three Stockholm-Based Early Stage Startups." Thesis, KTH, Entreprenörskap och Innovation, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-169580.

Full text
Abstract:
In the last decades, the technology in ICT sector has advanced significantly. Rapid improvement of Internet services and virtualization techniques have caused the birth of a handful of computing paradigms, including the cloud computing. There are a number of major global cloud service providers that offers various cloud services to individual and companies. Consequently, there are increasing numbers of companies that are moving to the cloud leading to proliferation of cloud computing market. This thesis explores the impact of cloud computing towards early stage startups in terms of usage, benefit, competitive advantage, and dependency in order to be sustainable in the focus of a specific country: Sweden. Stockholm has become one of the top tech startup scenes in Europe and has given birth to a great deal of startups, some of the internationally recognized ones including Spotify, Klarna, and King while there are other ones that have a potential to catch up with them. In order to give an insight about what the impacts of cloud computing towards the early stage startups, three Stockholm-based early stage startups from 3 different field of business were interviewed. To ensure the anonymity of the startups, the companies are referred to The Healthy Company, a startup that sells healthy food through pop-up bicycle; The Invest Company, a startup that develops mobile application to connect startups and investors; and The Learning Company, a startup that summarizes business books that take 8 hours to finish into just half an hour. Based on the findings of this study, there are several characteristics that are similar in all 3 startups regardless of their field of business.
APA, Harvard, Vancouver, ISO, and other styles
40

柯宜伶. "Internet Storage Services via Cloud Computing." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/04922939441804479807.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Chen, Sianliang, and 陳咸良. "Risk Assessment for Cloud Computing Services." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/33813307213365731309.

Full text
Abstract:
碩士
德明財經科技大學
資訊科技與管理研究所
99
With the rapid development of Cloud Computing Service, many companies want to import such services. However, there may be risks using Cloud Computing Services. Therefore, it is necessary to carry out risk assessments. We choose the risk factors mentioned in the article (ENISA editors, 2009), and through the interviews of experts, we try to identify the risk factors for Taiwan. As a result, we developed a risk assessment method for Taiwan's Cloud Computing Services.
APA, Harvard, Vancouver, ISO, and other styles
42

Olson, Michael James. "Cloud Computing Services for Seismic Networks." Thesis, 2014. https://thesis.library.caltech.edu/7939/9/thesis-submitted.pdf.

Full text
Abstract:
This thesis describes a compositional framework for developing situation awareness applications: applications that provide ongoing information about a user's changing environment. The thesis describes how the framework is used to develop a situation awareness application for earthquakes. The applications are implemented as Cloud computing services connected to sensors and actuators. The architecture and design of the Cloud services are described and measurements of performance metrics are provided. The thesis includes results of experiments on earthquake monitoring conducted over a year. The applications developed by the framework are (1) the CSN --- the Community Seismic Network --- which uses relatively low-cost sensors deployed by members of the community, and (2) SAF --- the Situation Awareness Framework --- which integrates data from multiple sources, including the CSN, CISN --- the California Integrated Seismic Network, a network consisting of high-quality seismometers deployed carefully by professionals in the CISN organization and spread across Southern California --- and prototypes of multi-sensor platforms that include carbon monoxide, methane, dust and radiation sensors.
APA, Harvard, Vancouver, ISO, and other styles
43

"Cloud Services Brokerage for Mobile Ubiquitous Computing." Thesis, 2015. http://hdl.handle.net/10388/ETD-2015-06-2084.

Full text
Abstract:
Recently, companies are adopting Mobile Cloud Computing (MCC) to efficiently deliver enterprise services to users (or consumers) on their personalized devices. MCC is the facilitation of mobile devices (e.g., smartphones, tablets, notebooks, and smart watches) to access virtualized services such as software applications, servers, storage, and network services over the Internet. With the advancement and diversity of the mobile landscape, there has been a growing trend in consumer attitude where a single user owns multiple mobile devices. This paradigm of supporting a single user or consumer to access multiple services from n-devices is referred to as the Ubiquitous Cloud Computing (UCC) or the Personal Cloud Computing. In the UCC era, consumers expect to have application and data consistency across their multiple devices and in real time. However, this expectation can be hindered by the intermittent loss of connectivity in wireless networks, user mobility, and peak load demands. Hence, this dissertation presents an architectural framework called, Cloud Services Brokerage for Mobile Ubiquitous Cloud Computing (CSB-UCC), which ensures soft real-time and reliable services consumption on multiple devices of users. The CSB-UCC acts as an application middleware broker that connects the n-devices of users to the multi-cloud services. The designed system determines the multi-cloud services based on the user's subscriptions and the n-devices are determined through device registration on the broker. The preliminary evaluations of the designed system shows that the following are achieved: 1) high scalability through the adoption of a distributed architecture of the brokerage service, 2) providing soft real-time application synchronization for consistent user experience through an enhanced mobile-to-cloud proximity-based access technique, 3) reliable error recovery from system failure through transactional services re-assignment to active nodes, and 4) transparent audit trail through access-level and context-centric provenance.
APA, Harvard, Vancouver, ISO, and other styles
44

Lin, Yi-Ping, and 林宜平. "Optimal Bundling Strategy for Cloud Computing Services." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/64472921923377976452.

Full text
Abstract:
碩士
國立臺灣大學
資訊管理學研究所
100
Like information goods or online services, a cloud computing service has network externality. That is, its value increases with the number of consumers using the service. Quantity discounts may encourage consumers to use cloud computing services. To the best of our knowledge, there is no model dedicated on analyzing bundling strategies of clouding computing services by considering both network externality and quantity discount. Therefore, in this thesis, we propose a model to analyze how the bundling strategies of cloud computing services are affected by network externality, quantity discount, marginal cost, fixed cost, and decreasing rate of marginal price. The proposed model investigates three bundling strategies, namely, pure components (PC), pure bundling (PB) and mixed bundling (MB). The results suggest that the optimal demand and profit increase with the network externality and the decreasing rate of marginal price, and decrease with the fixed cost and marginal cost. PB is optimal with lower decreasing rate of marginal price. Next, MB is more profitable when network externality is low and quantity is high, or when decreasing rate and quantity are high. PC is the optimal strategy when quantity is low and network externality is high. The optimal strategies are different for various market conditions. Therefore, the proposed model may offer service providers to develop the appropriate strategies based on the characteristics of the cloud computing services.
APA, Harvard, Vancouver, ISO, and other styles
45

Hong, Kuo-Tung, and 洪國棟. "Pricing Over Differentiated Hybrid Cloud Computing Services." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/45083933002357664272.

Full text
Abstract:
碩士
國立臺灣大學
電信工程學研究所
99
We propose pricing mechanisms for cloud computing systems based on contract theory and game theory. Differentiated pricing mechanism is for the intermediate period in which private data center is still popular. A service provider needs to deal with customers with and without private data center. Those customers without private data center tend to buy more cloud computing resources while customers with private data center use cloud computing only when it is cheap, due to the concept of decreasing marginal value in Economics. As a result, a service provider needs to know if customers have private data center for the purpose of price discrimination. In differentiated pricing mechanism, a service provider provides a menu for customers to order virtual machines, which is similar to the mechanism in Amazon Elastic Compute Cloud. We aim to design a menu that can maximize service provider’s profit. To achieve this goal, we use principal-agent model to induce customers'' hidden information, which is endowment computing power (i.e. size of private computing cloud). Our result shows that our differentiated pricing mechanism is able to maximize service provider’s profit and keep customer’s utility at their acceptable level. Differentiated pricing mechanism also shows that customers without her own private computing cloud will be exploited to get a lower utility gain than those with her own private computing cloud. Numerical results are also provided. General pricing mechanism is a general mechanism which can be applied to a system containing on-demand instances and spot instances like Amazon Elastic Compute Cloud. In the system, the service provider sells on-demand instances first. Then the service provider sells the remaining resources for spot instances. Our mechanism determines at which price on-demand instances should be sold and how many remaining resources should be sold for spot instances in order to maximize service provider’s revenue. Empirical data from Amazon Elastic Compute Cloud is also provided.
APA, Harvard, Vancouver, ISO, and other styles
46

Reixa, Miguel Carlos Gomes. "Sistema de avaliação de serviços de cloud computing." Master's thesis, 2012. http://hdl.handle.net/10071/5911.

Full text
Abstract:
Nesta dissertação proponho uma framework que seja de fácil e rápida aplicação para comparar e escolher o serviço de cloud computing que melhor se adeqúe às necessidades das organizações. Surge do desafio que me foi feito por parte de pessoas que precisavam de ter algum documento credível e com fundamento que as guiasse nesse processo de selecção. Iniciam-se as actividades desta dissertação com uma revisão da literatura da qual resulta a exposição das características de computação em nuvem, as definições existentes, tipos de organização, classificação e taxonomia consideradas mais importantes para dar um conhecimento básico a quem lê este documento. Na continuação da revisão da literatura estudaram-se também as estratégias de abordagem e metodologias de selecção e avaliação existentes tendo sido escolhidas as mais relevantes para atingir o objetivo. Segue-se a apresentação da framework de avaliação e escolha do serviço, baseado na investigação feita. Termina-se com uma aplicação em contexto real que serve para validar a sua aplicabilidade e para ilustrar como usar esta framework, de forma detalhada. Usando esta framework, as organizações podem optimizar os seus recursos e ao mesmo tempo terem confiança de que seleccionaram a melhor opção de serviço na nuvem aplicável às suas características especificas.
In this dissertation I propose one easy and quick framework to compare and choose the cloud service that best fit the organizations needs. It comes from a challenge made to me by people that need to have a credible and well based document that would help them in the selection process. The dissertation activities began with a literature review that result in exposed characteristics of cloud computing, existing definitions, types of organization, classification and taxonomy that were considered more important to make the framework construction. In the continuation of literature review was also studied the existing selection and evaluation approach strategies and methodologies that were considered most relevant to meet the goal. In the next step is presented the framework proposal to evaluate and select the cloud computing services, based on research already done. Ends up with a real context application that is used to validate the applicability and to illustrate how to use the framework, in detail. Using this framework, organizations can optimise their resources while having confidence that they have selected the best cloud service option applicable to their specific characteristics.
APA, Harvard, Vancouver, ISO, and other styles
47

Yang, Wei-Ping, and 楊媁萍. "Performance Modeling for Mashup Services in Cloud Computing." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/20896607109349079430.

Full text
Abstract:
碩士
國立交通大學
電信工程研究所
99
In this thesis, we apply Jackson's network queueing theorem to model the service mashup cloud computing environments. The key challenge in providing new mashup mobile applications in cloud computing, such as the real-time location-based services, lies in quantifying the delay resulting from integrating multiple cloud servers. Furthermore, it is necessary to consider the effects of adjusting the number of virtual machines (VMs) on the quality of service (QoS) of mobile applications for various traffic loads. However, an effective analytical model to characterize both the effects of integrating multiple cloud servers and scalable VMs is lacked in the literature. The proposed mashup multi-cloud analytical model can calculate the service waiting time for various numbers of VMs and different arrival rates. By simulations and analysis, we show that our model can accurately predict when the waiting time performance in mashup cloud servers will increase sharply for various numbers of VMs and traffic loads. Hence, the proposed mashup multi-cloud analytical model can facilitate the resource management design in future cloud data centers.
APA, Harvard, Vancouver, ISO, and other styles
48

Jauce, Filip, and 樂斐力. "Comparative Research of B2C Services in Cloud Computing." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/72464869450574146382.

Full text
Abstract:
碩士
國立臺灣大學
國際企業學研究所
100
This thesis introduced a comparative research of B2C services in cloud compu-ting. The underlying question of the research was how cloud services providers create a solid customer base to become profitable. As cloud services include many areas, the author chose personal cloud storage, online games and content on-demand for analysis. At the beginning, author proposed three strategic models that can be compared in current cloud service market. First model encompassed all individual cloud service providers that focus on one business only and had to build their base from scratch. The second model defined companies that originally manufactured consumer electronics, but started to face lower margins and decided to improve their revenues by offering soft-ware products to its current customers too. At last, the author organized software or internet companies that expanded its portfolio of services to hardware products as third strategic model. In order to understand cloud computing industry author used TOWS and Five forces analysis and also explained motives behind alliances and M&A’s in the industry. As to creating customer base, the author referred to Crossing the Chasm and Catalyst Code theories. Besides that, profitability and pricing methods of the cloud service pro-viders were researched, while freemium business model proved to be the most popular choice. As a result of customer base and revenue comparison, Apple exhibited the largest customer base at the time of writing and also the highest revenue. Google, which was researched as model 3, launched its personal cloud storage service also in the same way as companies in model 2. Therefore, strategic model 2 is the most suitable choice for personal cloud storage service customer base establishment. Dropbox, which was market leader until 2012, will have to increase its competitiveness and lower its freemium pricing. Regarding online games, Zynga will have more options to raise revenue than personal cloud storage companies. In terms of content on-demand platforms, Google, Apple and Amazon will be dominant, but there will be opportunity and need for consumer electronics manufacturers to enter this market segment.
APA, Harvard, Vancouver, ISO, and other styles
49

Chen-Tang, Hong, and 洪振棠. "A Web Spider Based on Cloud Computing Services." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/95908733676950981659.

Full text
Abstract:
碩士
國立臺北商業技術學院
商學研究所
98
With the rapid progress of the Internet, we can get all kinds of information through the Network. Besides, people have more chances to search data nowadays, and that is why we expect to build Internet Web Spider in order to support people for searching my valuable information, especially be in replaceable of seeing, hand operation, and partial logical judgement. In the past, we built similar Web Spider system, the searching speed is based on the bandwidth. We usually set up the system on the computer, build the database and web server as well. Moreover, we have to consider its specific installment system, maintenance of equipment and security. All above problems will cost a lot of labor, spirit, and money accordingly. However, because of Cloud Computing rising and government full support, major information service suppliers provide strong Cloud Computing ability and perfect service environment to solve the said problems. Our research will build a set of Web Spider system through the concept of Cloud Computing. The system operator will only need the browser to get specific information on the internet automatically in the future.
APA, Harvard, Vancouver, ISO, and other styles
50

Liu, Chien-Lun, and 劉建倫. "Services Business Model Design of Cloud Computing – ATM Services case study." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/17070750759658061973.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Cloud computing services' for other source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography