Simulation of Automated File Migratoon in Information Lifecycle Management

Information Lifecycle Management (ILM) is a strategic concept for storage of information and documents. ILM is based on the idea that in an enterprise information have different values. Information with different values are stored on different storage hierarchies. ILM offers significant potential cost savings by tiering storage and 90% of decision makers consider implementing ILM (Linden 2006). Nonetheless, there are too few experience reports and experimenting and researching in real systems are too expensive. This paper addresses this issue and contributes to supporting and assisting IT managers in their decision-making process. ILM automation needs migration rules. There are well-known static, heuristic migration rules and we present a new dynamic migration rule for ILM. These migration rules are implemented in an ILM simulator. We compare the performance of the new dynamic rule with the heuristics. The simulative approach has two advantages. On the one hand it offers predictions about the dynamic behaviour of an ILM migration rule and, on the other hand, it dispenses with real storage hardware. Simulation leads to decisions under certainty. When making a decision under certainty, the major problem is to determine which is the trade-off among different objectives. Cost-benefit analysis can be used to this purpose. A decision matrix is laid where rows represent choices and columns represent states of nature. The simulated results support the choice of migration rules and help to avoid mismanagement and poor investments in advance. The results raise the awareness of choosing the best alternative

A comparison of management of virtual machines with z/VM and ESX Server

Virtualization and virtual machines are becoming more and more important for businesses. By consolidating many servers to run as virtual machine on a single host companies can save considerable amounts on money. The savings come from the better utilization of the hardware, and by having less hardware that needs maintenance. There are several products for virtualization, and different methods to acheive the virtualization. This thesis will focus on comparing VMware ESX Server and z/VM. These products are quite different and run on different hardware. The primary focus of the comparison will be on management of the two different products.Master i nettverks- og systemadministrasjo

Estado del arte de pruebas de Bases de Datos para la migración y validación de datos

El objetivo principal de este proyecto de grado es la identificación de las pruebas de Bases de Datos para la Migración y Validación de Datos en el entorno de las tecnologías de información en Colombia en la actualidad; también se realizará un análisis comparativo con lo que están realizando a nivel internacional algunas de las empresas lideres y firmas consultoras que se encuentran involucradas en el tema de las bases de datos y la migración de datos -- Se inicia identificando en primera instancia los orígenes o razones por las cuales se llevan a cabo las migraciones de datos y los problemas a los cuales se enfrentan y las razones por las cuales se presentan dichos problemas -- El propósito es poder identificar de qué manera las pruebas para las migraciones y validaciones de datos pueden ayudar a reducir las probabilidades de ocurrencia de dichos problemas, para el beneficio no solo de proyecto como tal, sino de la empresa también -- De igual manera, se analizarán las herramientas empleadas y la influencia que pueden tener a la hora de realizar las pruebas -- Este proyecto no está orientado simplemente a la identificación de procesos y pruebas, sino también al reconocimiento de la importancia que los datos tienen para las decisiones en las organizaciones y el impacto que una buena calidad de los mismos tiene -- Por ello, también es importante identificar aspectos que rodean el tema, tales como los datos en primera instancia, las bases de datos, la migración y la validación, la calidad de datos y las prueba

Otimização do processo de comutação em redes de transporte

Mestrado em Engenharia Eletrónica e TelecomunicaçõesNo presente trabalho analisam-se os custos de implementação (CAPEX) de um nó inserido numa rede de transporte. São estudadas tecnologias de comutação de pacotes (MPLS-TP), tecnologias de comutação de circuitos (OTN) e tecnologias de comutação de canais óticos (ROADM). Com estas tecnologias são analisadas três arquiteturas para um nó, e, alterando o tráfego, comparam-se os benefícios e as limitações de cada arquitetura.In the present work, the capital expenditure (CAPEX) related with the implementation of a node in a transport network is analyzed. Technologies with different kind of switching are studied, such as MPLS-TP (packet switching), OTN (circuit switching) and ROADM (optical switching). Three different architectures combining these technologies are considered and, by changing the traffic, a comparison is performed in order to identify the limitations and advantages of each one

Towards a cloud enabler : from an optical network resource provisioning system to a generalized architecture for dynamic infrastructure services provisioning

This work was developed during a period where most of the optical management and provisioning system where manual and proprietary. This work contributed to the evolution of the state of the art of optical networks with new architectures and advanced virtual infrastructure services. The evolution of optical networks, and internet globally, have been very promising during the last decade. The impact of mobile technology, grid, cloud computing, HDTV, augmented reality and big data, among many others, have driven the evolution of optical networks towards current service technologies, mostly based on SDN (Software Defined Networking) architectures and NFV(Network Functions Virtualisation). Moreover, the convergence of IP/Optical networks and IT services, and the evolution of the internet and optical infrastructures, have generated novel service orchestrators and open source frameworks. In fact, technology has evolved that fast that none could foresee how important Internet is for our current lives. Said in other words, technology was forced to evolve in a way that network architectures became much more transparent, dynamic and flexible to the end users (applications, user interfaces or simple APIs). This Thesis exposes the work done on defining new architectures for Service Oriented Networks and the contribution to the state of the art. The research work is divided into three topics. It describes the evolution from a Network Resource Provisioning System to an advanced Service Plane, and ends with a new architecture that virtualized the optical infrastructure in order to provide coordinated, on-demand and dynamic services between the application and the network infrastructure layer, becoming an enabler for the new generation of cloud network infrastructures. The work done on defining a Network Resource Provisioning System established the first bases for future work on network infrastructure virtualization. The UCLP (User Light Path Provisioning) technology was the first attempt for Customer Empowered Networks and Articulated Private Networks. It empowered the users and brought virtualization and partitioning functionalities into the optical data plane, with new interfaces for dynamic service provisioning. The work done within the development of a new Service Plane allowed the provisioning of on-demand connectivity services from the application, and in a multi-domain and multi-technology scenario based on a virtual network infrastructure composed of resources from different infrastructure providers. This Service Plane facilitated the deployment of applications consuming large amounts of data under deterministic conditions, so allowing the networks behave as a Grid-class resource. It became the first on-demand provisioning system that at lower levels allowed the creation of one virtual domain composed from resources of different providers. The last research topic presents an architecture that consolidated the work done in virtualisation while enhancing the capabilities to upper layers, so fully integrating the optical network infrastructure into the cloud environment, and so providing an architecture that enabled cloud services by integrating the request of optical network and IT infrastructure services together at the same level. It set up a new trend into the research community and evolved towards the technology we use today based on SDN and NFV. Summing up, the work presented is focused on the provisioning of virtual infrastructures from the architectural point of view of optical networks and IT infrastructures, together with the design and definition of novel service layers. It means, architectures that enabled the creation of virtual infrastructures composed of optical networks and IT resources, isolated and provisioned on-demand and in advance with infrastructure re-planning functionalities, and a new set of interfaces to open up those services to applications or third parties.Aquesta tesi es va desenvolupar durant un període on la majoria de sistemes de gestió de xarxa òptica eren manuals i basats en sistemes propietaris. En aquest sentit, la feina presentada va contribuir a l'evolució de l'estat de l'art de les xarxes òptiques tant a nivell d’arquitectures com de provisió d’infraestructures virtuals. L'evolució de les xarxes òptiques, i d'Internet a nivell mundial, han estat molt prometedores durant l'última dècada. L'impacte de la tecnologia mòbil, la computació al núvol, la televisió d'alta definició, la realitat augmentada i el big data, entre molts altres, han impulsat l'evolució cap a xarxes d’altes prestacions amb nous serveis basats en SDN (Software Defined Networking) i NFV (Funcions de xarxa La virtualització). D'altra banda, la convergència de xarxes òptiques i els serveis IT, junt amb l'evolució d'Internet i de les infraestructures òptiques, han generat nous orquestradors de serveis i frameworks basats en codi obert. La tecnologia ha evolucionat a una velocitat on ningú podria haver predit la importància que Internet està tenint en el nostre dia a dia. Dit en altres paraules, la tecnologia es va veure obligada a evolucionar d'una manera on les arquitectures de xarxa es fessin més transparent, dinàmiques i flexibles vers als usuaris finals (aplicacions, interfícies d'usuari o APIs simples). Aquesta Tesi presenta noves arquitectures de xarxa òptica orientades a serveis. El treball de recerca es divideix en tres temes. Es presenta un sistema de virtualització i aprovisionament de recursos de xarxa i la seva evolució a un pla de servei avançat, per acabar presentant el disseny d’una nova arquitectura capaç de virtualitzar la infraestructura òptica i IT i proporcionar serveis de forma coordinada, i sota demanda, entre l'aplicació i la capa d'infraestructura de xarxa òptica. Tot esdevenint un facilitador per a la nova generació d'infraestructures de xarxa en el núvol. El treball realitzat en la definició del sistema de virtualització de recursos va establir les primeres bases sobre la virtualització de la infraestructura de xarxa òptica en el marc de les “Customer Empowered Networks” i “Articulated Private Networks”. Amb l’objectiu de virtualitzar el pla de dades òptic, i oferir noves interfícies per a la provisió de serveis dinàmics de xarxa. En quant al pla de serveis presentat, aquest va facilitat la provisió de serveis de connectivitat sota demanda per part de l'aplicació, tant en entorns multi-domini, com en entorns amb múltiples tecnologies. Aquest pla de servei, anomenat Harmony, va facilitar el desplegament de noves aplicacions que consumien grans quantitats de dades en condicions deterministes. En aquest sentit, va permetre que les xarxes es comportessin com un recurs Grid, i per tant, va esdevenir el primer sistema d'aprovisionament sota demanda que permetia la creació de dominis virtuals de xarxa composts a partir de recursos de diferents proveïdors. Finalment, es presenta l’evolució d’un pla de servei cap una arquitectura global que consolida el treball realitzat a nivell de convergència d’infraestructures (òptica + IT) i millora les capacitats de les capes superiors. Aquesta arquitectura va facilitar la plena integració de la infraestructura de xarxa òptica a l'entorn del núvol. En aquest sentit, aquest resultats van evolucionar cap a les tendències actuals de SDN i NFV. En resum, el treball presentat es centra en la provisió d'infraestructures virtuals des del punt de vista d’arquitectures de xarxa òptiques i les infraestructures IT, juntament amb el disseny i definició de nous serveis de xarxa avançats, tal i com ho va ser el servei de re-planificació dinàmicaPostprint (published version

Evolution of professional services in information technology product firms

Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, 2012.Cataloged from PDF version of thesis.Includes bibliographical references (p. 253-262).The innovative firm must continually evaluate its boundaries - decisions often shaped through make-buy-partner evaluations and choices about where to define the firm's competences. Building off of earlier work that suggests heterogeneity in types of organizational competences, I submit that a firm's portfolio of organizational capabilities map across three states: core, supplementary, and complementary. Core capabilities are the defining competences that are imprinted during the founding and formative years of the firm. Persistence in the core often leads to inaction and failure. Supplementary capabilities may form after the firm establishes its core and whose origins are traced to diversification expansion events. Complementary capabilities may form at founding and/or as managers detect competence gaps during changing conditions. Complementary is activated primarily to increase the value of the core. Given the firm as a portfolio of heterogeneous competences, the dissertation's focus is on when, why, and how the established innovator activates new complementary capabilities in dynamic environments. The context is hardware product vendors within the Information Technology (IT) industry and the complementary organizational capability is the business of professional services - e.g., consulting, systems integration, and custom implementation. Considering the expansion into professional services as a type of related diversification, the first paper uses panel data of U.S.-based IT product firms from 1987-2008 to explore the industry-level patterns behind the expansion into complementary services-centric domains given the core expertise in R&D-centric activities. I find that product firms who were diversified into more complementary R&D-centric activities (e.g., software) were more likely to diversify into complementary professional services - suggesting that professional services are part of a larger architectural/portfolio enablement strategy. The next part of the dissertation explores this phenomenon further by examining the process by which two innovative firms activate new complementary capabilities using polar-opposite dominant models: EMC preferred to "make" while Cisco preferred to "partner." Both case studies emphasize the process and unique dilemmas with the activation and evolution of complementary capabilities from 1995-2010, an era marked by continuous technological change and market uncertainties. I conclude with a discussion of the common patterns across these two firms and managerial implications.by Phillip C. Anderson.Ph.D

Estudo e planeamento de uma infraestrutura computacional

As tecnologias de informação representam um pilar fundamental nas organizações como sustento do negócio através de infraestruturas dedicadas sendo que com o evoluir do crescimento no centro de dados surgem desafios relativamente a escalabilidade, tolerância à falha, desempenho, alocação de recursos, segurança nos acessos, reposição de grandes quantidades de informação e eficiência energética. Com a adoção de tecnologias baseadas em cloud computing aplica-se um modelo de recursos partilhados de modo a consolidar a infraestrutura e endereçar os desafios anteriormente descritos. As tecnologias de virtualização têm como objetivo reduzir a infraestrutura levantando novas considerações ao nível das redes locais e de dados, segurança, backup e reposição da informação devido á dinâmica de um ambiente virtualizado. Em centros de dados esta abordagem pode representar um nível de consolidação elevado, permitindo reduzir servidores físicos, portas de rede, cablagem, armazenamento, espaço, energia e custo, assegurando os níveis de desempenho. Este trabalho permite definir uma estratégia de consolidação do centro de dados em estudo que permita a tolerância a falhas, provisionamento de novos serviços com tempo reduzido, escalabilidade para mais serviços, segurança nas redes Delimitarized Zone (DMZ), e backup e reposição de dados com impacto reduzido nos recursos, permitindo altos débitos e rácios de consolidação do armazenamento. A arquitetura proposta visa implementar a estratégia com tecnologias otimizadas para o cloud computing. Foi realizado um estudo tendo como base a análise de um centro de dados através da aplicação VMWare Capacity Planner que permitiu a análise do ambiente por um período de 8 meses com registo de métricas de acessos, utilizadas para dimensionar a arquitetura proposta. Na implementação da abordagem em cloud valida-se a redução de 85% de infraestrutura de servidores, a latência de comunicação, taxas de transferência de dados, latências de serviços, impacto de protocolos na transferência de dados, overhead da virtualização, migração de serviços na infraestrutura física, tempos de backup e restauro de informação e a segurança na DMZ