A large amount of today's communication occurs within data centers where a large number of virtual servers (running one or more virtual machines) provide service providers with the infrastructure needed for their applications and services. In this thesis, we will look at the next step in the virtualization revolution, the virtualized network. Software-defined networking (SDN) is a relatively new concept that is moving the field towards a more software-based solution to networking. Today when a packet is forwarded through a network of routers, decisions are made at each router as to which router is the next hop destination for the packet. With SDN these decisions are made by a centralized SDN controller that decides upon the best path and instructs the devices along this path as to what action each should perform. Taking SDN to its extreme minimizes the physical network components and increases the number of virtualized components. The reasons behind this trend are several, although the most prominent are simplified processing and network administration, a greater degree of automation, increased flexibility, and shorter provisioning times. This in turn leads to a reduction in operating expenditures and capital expenditures for data center owners, which both drive the further development of this technology. Virtualization has been gaining ground in the last decade. However, the initial introduction of virtualization began in the 1970s with server virtualization offering the ability to create several virtual server instances on one physical server. Today we already have taken small steps towards a virtualized network by virtualization of network equipment such as switches, routers, and firewalls. Common to virtualization is that it is in early stages all of the technologies have encountered trust issues and general concerns related to whether software-based solutions are as rugged and reliable as hardware-based solutions. SDN has also encountered these issues, and discussion of these issues continues among both believers and skeptics. Concerns about trust remain a problem for the growing number of cloud-based services where multitenant deployments may lead to loss of personal integrity and other security risks. As a relatively new technology, SDN is still immature and has a number of vulnerabilities. As with most software-based solutions, the potential for security risks increases. This thesis investigates how denial-of-service (DoS) attacks affect an SDN environment and a single-threaded controller, described by text and via simulations. The results of our investigations concerning trust in a multi-tenancy environment in SDN suggest that standardization and clear service level agreements are necessary to consolidate customers’ confidence. Attracting small groups of customers to participate in user cases in the initial stages of implementation can generate valuable support for a broader implementation of SDN in the underlying infrastructure. With regard to denial-of-service attacks, our conclusion is that hackers can by target the centralized SDN controller, thus negatively affect most of the network infrastructure (because the entire infrastructure directly depends upon a functioning SDN controller). SDN introduces new vulnerabilities, which is natural as SDN is a relatively new technology. Therefore, SDN needs to be thoroughly tested and examined before making a widespread deployment. / Dagens kommunikation sker till stor del via serverhallar där till stor grad virtualiserade servermiljöer förser serviceleverantörer med infrastukturen som krävs för att driva dess applikationer och tjänster. I vårt arbete kommer vi titta på nästa steg i denna virtualiseringsrevolution, den om virtualiserade nätverk. mjukvarudefinierat nätverk (eng. Software-defined network, eller SDN) kallas detta förhållandevis nya begrepp som syftar till mjukvarubaserade nätverk. När ett paket idag transporteras genom ett nätverk tas beslut lokalt vid varje router vilken router som är nästa destination för paketet, skillnaden i ett SDN nätverk är att besluten istället tas utifrån ett fågelperspektiv där den bästa vägen beslutas i en centraliserad mjukvaruprocess med överblick över hela nätverket och inte bara tom nästa router, denna process är även kallad SDN kontroll. Drar man uttrycket SDN till sin spets handlar det om att ersätta befintlig nätverksutrustning med virtualiserade dito. Anledningen till stegen mot denna utveckling är flera, de mest framträdande torde vara; förenklade processer samt nätverksadministration, större grad av automation, ökad flexibilitet och kortare provisionstider. Detta i sin tur leder till en sänkning av löpande kostnader samt anläggningskostnader för serverhallsinnehavare, något som driver på utvecklingen. Virtualisering har sedan början på 2000-talet varit på stark frammarsch, det började med servervirtualisering och förmågan att skapa flertalet virtualiserade servrar på en fysisk server. Idag har vi virtualisering av nätverksutrustning, såsom switchar, routrar och brandväggar. Gemensamt för all denna utveckling är att den har i tidigt stadie stött på förtroendefrågor och överlag problem kopplade till huruvida mjukvarubaserade lösningar är likvärdigt robusta och pålitliga som traditionella hårdvarubaserade lösningar. Detta problem är även något som SDN stött på och det diskuteras idag flitigt bland förespråkare och skeptiker. Dessa förtroendefrågor går på tvären mot det ökande antalet molnbaserade tjänster, typiska tjänster där säkerheten och den personliga integriten är vital. Vidare räknar man med att SDN, liksom annan ny teknik medför vissa barnsjukdomar såsom kryphål i säkerheten. Vi kommer i detta arbete att undersöka hur överbelastningsattacker (eng. Denial-of-Service, eller DoS-attacker) påverkar en SDN miljö och en singel-trådig kontroller, i text och genom simulering. Resultatet av våra undersökningar i ämnet SDN i en multitenans miljö är att standardisering och tydliga servicenivåavtal behövs för att befästa förtroendet bland kunder. Att attrahera kunder för att delta i mindre användningsfall (eng. user cases) i ett inledningsskede är också värdefullt i argumenteringen för en bredare implementering av SDN i underliggande infrastruktur. Vad gäller DoS-attacker kom vi fram till att det som hackare går att manipulera en SDN infrastruktur på ett sätt som inte är möjligt med dagens lösningar. Till exempel riktade attacker mot den centraliserade SDN kontrollen, slår man denna kontroll ur funktion påverkas stora delar av infrastrukturen eftersom de är i ett direkt beroende av en fungerande SDN kontroll. I och med att SDN är en ny teknik så öppnas också upp nya möjligheter för angrepp, med det i åtanke är det viktigt att SDN genomgår rigorösa tester innan större implementation.

Based primarily on notarized farm leases, this thesis examines approaches to agriculture on the island of Montreal from 1780 to 1820. This source permits us to establish the crucial relationship between people and farms and to then link them to differences in capital investment, production and farming techniques. By understanding the common, day-to-day farming operations, we can address ourselves to the larger questions of what contributed to the state of Lower Canadian agriculture, a subject of contentious debate in Quebec historiography. / The island of Montreal, already favoured by the geographic circumstances of climate, soil and location, was also a crucible for two profound changes which were occurring in Quebec society during this period--the beginning of a wave of English-speaking immigrants who would permanently alter the ethnic composition of the province's population, and the development of a significant urban market. In the 564 notarized farm leases passed in this forty-year period, half of the lessors were merchants and professionals, most of whom resided in the city and suburbs of Montreal. The farms of the urban bourgeoisie were on average larger and better-stocked than the farms of habitants, artisans and other proprietors. Most attempts at agricultural innovation and more intensive cultivation occurred on the farms of this elite, not on the lands owned by those with less capital resources: capital, not ethnicity, directed the approach taken to farming.

Typescript. / Thesis (Ph. D.)--University of Hawaii at Manoa, 1984. / Bibliography: leaves 160-170. / Microfiche. / xiii, 170 leaves, bound ill. 29 cm

FundaÃÃo de Amparo à Pesquisa do Estado do Cearà / A computaÃÃo em nuvens à um paradigma bem consolidado de utilizaÃÃo de recursos computacionais, segundo o qual infraestrutura de hardware, software e plataformas para o desenvolvimento de novas aplicaÃÃes sÃo oferecidos como serviÃos disponÃveis remotamente e em escala global. Os usuÃrios de nuvens computacionais abrem mÃo de uma infraestrutura computacional prÃpria para dispÃ-la mediante serviÃos oferecidos por provedores de nuvem, delegando aspectos de Qualidade de ServiÃo (QoS) e assumindo custos proporcionais à quantidade de recursos que utilizam modelo de pagamento baseado no uso. Essas garantias de QoS sÃo definidas entre o provedor do serviÃo e o usuÃrio, e expressas por meio de Acordo de NÃvel de ServiÃo (SLA), o qual consiste de contratos que especificam um nÃvel de qualidade a ser atendido, e penalidades em caso de falha. A maioria das aplicaÃÃes em nuvem à orientada a dados e, por conta disso, Sistemas Gerenciadores de Banco de Dados (SGBDs) sÃo candidatos potenciais para a implantaÃÃo em nuvem. SGBDs em nuvem devem tratar uma grande quantidade de aplicaÃÃes ou inquilinos. Os modelos de multi-inquilinatos sÃo utilizados para consolidar vÃrios inquilinos dentro de um sà SGBD, favorecendo o compartilhamento eficaz de recursos, alÃm de gerenciar uma grande quantidade de inquilinos com padrÃes de carga de trabalho irregulares. Por outro lado, os provedores em nuvem devem reduzir os custos operacionais, garantindo a qualidade. Para muitas aplicaÃÃes, o maior tempo gasto no processamento das requisiÃÃes està relacionado ao tempo de execuÃÃo do SGBD. Portanto, torna-se importante que um modelo de qualidade seja aplicado ao SGBD para seu desempenho. TÃcnicas de provisionamento dinÃmico sÃo voltadas para o tratamento de cargas de trabalho irregulares, para que violaÃÃes de SLA sejam evitadas. Sendo assim, uma estratÃgia para ajustar a nuvem no momento em que se prevà um comportamento que pode violar o SLA de um dado inquilino (banco de dados) deve ser considerada. As tÃcnicas de alocaÃÃo sÃo usadas no intuito de aproveitar os recursos do ambiente em detrimento ao provisionamento. Com base nos sistemas de monitoramento e de modelos de otimizaÃÃo, as tÃcnicas de alocaÃÃo decidem onde serà o melhor local para receber um dado inquilino. Para realizar a transferÃncia do inquilino de forma eficiente, tÃcnicas de Live Migration sÃo adotadas para ter o mÃnimo de interrupÃÃo do serviÃo. Acredita-se que a combinaÃÃo destas trÃs tÃcnicas podem contribuir para o desenvolvimento de um soluÃÃo robusta de QoS para bancos de dados em nuvem, minimizando violaÃÃes de SLA. Ante tais desafios, esta tese apresenta uma abordagem, denominada PMDB, para melhorar QoS em SGBDs multi-inquilinos em nuvem. A abordagem tem como objetivo reduzir o nÃmero de violaÃÃes de SLA e aproveitar os recursos à disposiÃÃo por meio de tÃcnicas que realizam prediÃÃo de carga de trabalho, alocaÃÃo e migraÃÃo de inquilinos quando necessitam de recursos com maior capacidade. Para isso, uma arquitetura foi proposta e um protÃtipo implementado com tais tÃcnicas, alÃm de estratÃgias de monitoramento e QoS voltada para aplicaÃÃes de banco de dados em nuvem. Ademais, alguns experimentos orientados a desempenho foram especificados para mostrar a eficiÃncia da abordagem a fim de alcanÃar o objetivo em foco. / Cloud computing is a well-established paradigm of computing resources usage, whereby hardware infrastructure, software and platforms for the development of new applications are offered as services available remotely and globally. Cloud computing users give up their own infrastructure to dispose of it through the services offered by cloud providers, to which they delegate aspects of Quality of Service (QoS) and assume costs proportional to the amount of resources they use, which is based on a payment model. These QoS guarantees are established between the service provider and the user, and are expressed through Service Level Agreements (SLA). This agreement consists of contracts that specify a level of quality that must be met, and penalties in case of failure. The majority of cloud applications are data-driven, and thus Database Management Systems (DBMSs) are potential candidates for cloud deployment. Cloud DBMS should treat a wide range of applications or tenants. Multi-tenant models have been used to consolidate multiple tenants within a single DBMS, favoring the efficient sharing of resources, and to manage a large number of tenants with irregular workload patterns. On the other hand, cloud providers must be able to reduce operational costs while keeping quality levels as agreed. To many applications, the longer time spent in processing requests is related to the DBMS runtime. Therefore, it becomes important to apply a quality model to obtain DBMS performance. Dynamic provisioning techniques are geared to treat irregular workloads so that SLA violations are avoided. Therefore, it is necessary to adopt a strategy to adjust the cloud at the time a behavior that may violate the SLA of a given tenant (database) is predicted. The allocation techniques are applied in order to utilize the resources of the environment to the dentriment of provisioning. Based on both the monitoring and the optimization models systems, the allocation techniques will decide the best place to assign a given tenant to. In order to efficiently perform the transfer of the tenant, minimal service interruption, Live Migration techniques are adopted. It is believed that the combination of these three techniques may contribute to the development of a robust QoS solution to cloud databases which minimizes SLA violations. Faced with these challenges, this thesis proposes an approach, called PMDB, to improve DBMS QoS in multi-tenant cloud. The approach aims to reduce the number of SLA violations and take advantage the resources that are available using techniques that perform workload prediction, allocation and migration of tenants when greater capacity resources are needed. An architecture was then proposed and a prototype implementing such techniques was developed, besides monitoring strategies and QoS oriented database applications in the cloud. Some performance oriented experiments were then specified to show the effectiveness of our approach.

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Bakgrund: Oavsett ägandeform är det idag en utmaning för unga vuxna att lämna föräldrahemmet.Detta är resultatet av en icke fungerande bostadsmarknad som förvisso genomgått stora förändringarsedan införandet av bostadsrätt som ägandeform. Jämfört med 1960-talet är det idag möjligt attpantsätta bostadsrätten trots att den boende inte äger objektet, det råder inte heller längre någonprisreglering. Tvärtom anställs fastighetsmäklaren för att maximera slutpriset vid avyttrandet avbostaden.Dessutom menar tidigare studier att ungdomar har en tydlig ambition att äga boendet, men på grund avkreditrestriktioner inte har möjligheter till det. För att minska inträdesbarriärerna till ägandemarknadenpresenterade utredaren Eva Nordström den 4 april 2022 Startlånet. En subvention som ska minskakontantinsatskravet för bland annat ungdomar. Följdeffekterna förväntas bli ökad utbyggnadstakt,förstärkt köpkraft och framför allt fler ungdomar på ägandemarknaden. Syfte: Denna studie redogör för unga vuxnas förutsättningar och begäran på bostadsmarknaden.Genom att jämföra statistiska samt politiska förändringar med tiden ska läsaren bilda sig enuppfattning om dagens bostadsbestånd och startlånets påverkan till av det ägda boendet. Metod: Uppsatsen utgår från en kvantitativ metod med en induktiv infallsvinkel. Det är således attbetrakta som en metastudie. För att säkerställa arbetets reliabilitet och validitet har det varit av högstavikt att använda anförtrodda källor. Studien är ämnad för att läsaren i framtiden ska kunna återupprepaarbetet med samma utfall. Resultat och slutsats: Förändringen av de juridiska och ekonomiska förutsättningarna har medfört enförändrad syn av boendet. Från att vara ett hem till att numera även betraktas som ett attraktivtinvesteringsföremål. Denna syn på bostaden har satt sin prägel i andelsfördelningen av ägandeformer ibostadsbeståndet. För grupper i samhället med lågt kapital och i synnerhet ungdomar ärkontantinsatsen en stor inträdesbarriär. Startlånet, som är ämnat för att hjälpa ungdomar in påägarmarknaden kan dels ses som en väg in för unga vuxna, dels som ett sätt att blunda för de stigandebostadspriserna. Studiens bidrag: Studien har bidragit med en redogörelse för hur dagens bostadsbestånd har formats.Detta har lagt grunden för att sedan diskutera hur startlånet kommer förändra möjligheten förungdomar att äga bostad i Sverige. Slutligen har studien även beskrivit vad ungdomar menar hindrardem från deras drömbostad. Framtida forskning: Det hade varit av intresse att i framtida forskning studera hur subventioner sominte primärt är riktade mot kreditbegränsningar skulle främja ungdomars förutsättningar påbostadsmarknaden, förslagsvis hyrköp. Ett annat intressant forskningsområde skulle vara att utföra enkomparativ studie mellan svenska ungdomar respektive en annan nations syn på det ägda boendet. / Background: Regardless of the ownership structure, it is today a challenge for young adults to leavethe parental home. This is the result of a non-functioning housing market that has certainly undergonemajor transformation since the introduction of condominium ownership. Compared with the 1960s, itis today possible to mortgage the condominium even though the resident does not own the object, noris there any price regulation anymore. On the contrary, the real estate agent is hired to maximize thefinal price when selling an object.Previous studies believe that youngsters have a clear ambition to own a condominium, although, dueto credit restrictions do not have the opportunity to do so. To reduce entry-barriers into the ownershipmarket, investigator Eva Nordström presented the Startup loan on 4 April 2022. A subsidy that willreduce the cash contribution requirement for young people, among others. The aftereffects areexpected to be an increased rate of new buildings, strengthened purchasing power and, above all, moreyoung people in the ownership market. Purpose: This study describes the conditions and demands of youngsters in the housing market.Hence, comparing statistical and political changes over time, the reader should form an opinion aboutthe current housing stock and how the start-up loan will affect the possibility of the owned housing. Method: The essay is based on a quantitative method with an inductive approach. It is thus to beregarded as a meta-study. In order to ensure the reliability and validity of the work, it has been of theultimate importance to use trusted sources. The study is intended for the reader in the future to be ableto repeat the work with the same outcome. Results and conclusion: The change in the legal conditions and economic development has resultedinto a developed perception of property ownership. From simply being a home to nowadays furtherbeing considered an attractive investment object. This view of housing has left its mark on thedistribution of ownership forms in the housing stock. For low-income groups, especially youngpeople, the cash contribution is a major entry-barrier. The startup loan is intended to help youngpeople enter the ownership market and can therefore be seen as guidance for young adults. However,on the contrary one can argue that the subsidy is a way to turn a blind eye to rising housing prices. The study's contribution: This study has contributed with an account of how the current housingstock has been shaped. This has laid the foundation for then discussing how the startup loan will from the future of owned apartments in Sweden. In addition, the study has described what youngsters argueprevents them from owning a home. Future research: It would have been of interest in future research to study how subsidies that are notprimarily aimed at credit limits would promote young people's conditions in the housing market, forexample rental purchases. Another interesting area of research would be to carry out a comparativestudy between Swedish young people and another nation's view of owned housing.

Examensarbetets titel - Besittningsskyddets balansering mellan hyresgäst och hyresvärd.Inlämningsdatum - 2017-05-18.Kurs - FF321F Fastighetsvetenskap: examensarbete.Författare - Johanna Helm, Catharina Swartz.Handledare - Peter Gottschalk.Nyckelord - Besittningsskydd, hyresgäst, hyresvärd, förverkandegrunder,hyresrätt, rättsfallSyfte - Syftet med studien är att analysera besittningsskyddet och se omdet är i behov av att balanseras om.Metod - Vi har valt att använda en rättsdogmatisk metod till denna studiedå den är bäst lämpad. Vi har bland annat studerat och fastställtgällande rätt, men även historien bakom besittningsskyddetsuppkomst. Detta gjordes genom att studera rättskälleläran sominnefattar lagar, propositioner, offentliga utredningar, rättspraxisoch doktrin.Gällande rätt - Vi har valt att fokusera på besittningsskyddets förverkandegrunderobetald hyra, vanvård av bostad, brottslig verksamhet samt olovligöverlåtelse. Vi har studerat rättsfall och domslut kring dessa.Analys och slutsats - Vi har kommit fram till att besittningsskyddet borde omformulerasnär det kommer till obetald hyra och vanvård av bostad. Det hadeäven varit bra om det förtydligats inom brottslig verksamhet då detär många rekvisit som ska uppfyllas. / Title - The balancing of the security of tenure between the tenant and thelandlord.Date - of submission 2017-05-18.Course - FF321F Real Estate Science: Degree Thesis.Authors - Johanna Helm, Catharina Swartz.Advisor - Peter Gottschalk.Key words - Security of tenure, tenant, landlord, forfeiture of property, tenancy,case.Purpose - The purpose of this study is to analyze the security of tenure andsee if it needs re-balancing.Methodology - For this paper we have chosen the legal method, because it is bestsuited for the purpose. We have studied and concluded the lawregarding the security of tenure and its history. We did this bystudying sources of the law, which are: the law, government bills,case law and doctrine.The Law - We chose to focus on the security of tenure´s forfeiture of propertyunpaid rent/part of rent, mismanagement of the apartment, criminalactivity and illegal transfer of tenant.Conclusion - We concluded that the security of tenure should be rewritten whenit comes to unpaid rent and mismanagement of the apartment. Wealso think it would be good if the necessary conditions for criminalactivity would be clarified.

Apache Kafka is a distributed, high throughput and fault-tolerant publish/subscribe messaging system in the Hadoop ecosystem. It is used as a distributed data streaming and processing platform. Kafka topics are the units of message feeds in the Kafka cluster. Kafka producer publishes messages into these topics and a Kafka consumer subscribes to topics to pull those messages. With the increased usage of Kafka in the data infrastructure of many companies, there are many Kafka clients that publish and consume messages to/from the Kafka topics. In fact, these client operations can be malicious. To mitigate this risk, clients must authenticate themselves and their operation must be authorized before they can access to a given topic. Nowadays, Kafka ships with a pluggable Authorizer interface to implement access control list (ACL) based authorization for client operation. Kafka users can implement the interface differently to satisfy their security requirements. SimpleACLAuthorizer is the out-of-box implementation of the interface and uses a Zookeeper for ACLs storage.HopsWorks, based on Hops a next generation Hadoop distribution, provides support for project-based multi-tenancy, where projects are fully isolated at the level of the Hadoop Filesystem and YARN. In this project, we added Kafka topicbased multi-tenancy in Hops projects. Kafka topic is created from inside Hops project and persisted both at the Zookeeper and the NDBCluster. Persisting a topic into a database enabled us for topic sharing across projects. ACLs are added to Kafka topics and are persisted only into the database. Client access to Kafka topics is authorized based on these ACLs. ACLs are added, updated, listed and/or removed from the HopsWorks WebUI. HopsACLAuthorizer, a Hops implementation of the Authorizer interface, authorizes Kafka client operations using the ACLs in the database. The Apache Avro schema registry for topics enabled the producer and consumer to better integrate by transferring a preestablished message format. The result of this project is the first Hadoop distribution that supports Kafka multi-tenancy.

The Grandview Woodland local area of Vancouver, British Columbia, is an area in transition. Retail, demographic, residential occupancy, and changes to built structures indicate that gentrification has escalated in the past seven years. Long standing impediments to gentrification, including industrial manufacturing, social housing, and crime, are not deterring change in this area to the extent they once did. This thesis examines how public policy has affected these changes in Grandview Woodland. Public policies embodied in laws and regulations have the capacity to either encourage or dissuade gentrification; however, other variables also influence gentrification making it difficult to determine the importance and influence of public policy in the process. This thesis uses semi-structured interviews and a document review in a case study of Grandview Woodland, to gain a better understanding of how public policies can influence gentrification in a local area where gentrification was previously impeded. The findings from this study suggest that public policies can have a substantial, but not autonomous, effect on gentrification in such an area. In Grandview Woodland, policy makers facilitate gentrification through city-wide and province-wide policies, including zoning changes, the Strata Title Act, and the Residential Tenancy Act. While these public policies have streamlined the advance of gentrification in Grandview Woodland, the catalysts for gentrification are the wider national trend of increased popularity of inner-city living, and the middle class moving eastwards in search of affordable homes in response to the massive property value increases in Vancouver’s West Side. / Graduate / 0617 / 0615 / 0999 / p.b.kasman@gmail.com

<p>Sve češćom upotrebom cloud okruženja dolazi do potrebe da se postojeća softverska rešenja migriraju. Metodologija za migraciju na cloud postoji više, gde se u finalnim fazama planiraju modifikacije nad arhitekturom softvera tako da se iskoriste prednosti cloud sistema. Za ekonomsku efikasnost usled uštede resursa je neophodna višeorganizacijska osobina. Svrha ovog istraživanja je da pojasni višeorganizacijsko svojstvo i da predloži rešenje za migraciju postojećih softvera na višeorganizacijski SaaS ali sa što manje neophodnih modifikacija ciljnog softvera. S toga je predloženo rešenje platforma koja omogućuje lakšu migraciju. Nakon faze istraživanja i sagledavanja domena pametnih elektroenergetskih mreža, kreiran je prototip predloženog rešenja kao i niz eksperimenata u skladu sa definisanim naučnim pitanjima. Eksperimenti su izvršeni u privatnom cloud okruženju. Hipoteze su adresirane kroz viziju primene rešenja na NDMS (Napredni distributivni menadžment sistem) u slučaju šest organizacija, a doneti su sledeći zaključci: višeorganizacijskim modelom se ostvaruju uštede u resursima od 32%, za tri reda veličine veća visoka dostupnost, ali uz usporenja do 20 milisekundi po svakom servisnom zahtevu. Takođe, aplikativni model učesnika modernih PaaS usluga nije primeren gde je sinhronizam zahtevan, niti u slučajevima gde se očekuju odgovori nad skupom učesnika u realnom vremenu. Istraživanje ukazuje na mogućnost primene višeorganizacijskog modela čak i u slučaju kompleksnih rešenja kakva se sreću u domenu pametnih elektroenergetskih mreža, a akademskom validacijom potvrđuju način implementacije važnog finalnog koraka u procesu migracije softvera na cloud bazirani SaaS.</p> / <p>Progressive cloud adoption requires migration of existing software solutions. Today, many cloud adoption methodologies exist. Usually, the final phase in cloud adoption include software architecture modifications to make the most of the benefits of cloud computing, like multi-tenancy which enables economic efficiency. The aim of this research is to explain the multi-tenancy and to provide a solution for migration of existing software to multi-tenant SaaS while modifying the target software as little as possible. Therefore, the research proposes a platform that enables easier cloud adoption. After the research phase focused on a smart grid domain, the prototype was created with experiments targeting formulated research questions. The experiments were conducted in a private cloud environment. Research hypotheses were analyzed using hypothetical multi-tenant ADMS (Advanced Distribution Management System) in case of six tenants, with the following conclusions: multi-tenancy saves 32% of resources, it provides three orders of magnitude higher availability, but affects performances by introducing a delay of up to 20 milliseconds per service request. Also, reliable actors programing model used in modern PaaS services is not suitable in use cases with needs for synchronous behavior, nor in in use cases where querying a set of actors is needed in real time. The research demonstrates feasibility of applying multi-tenancy even in cases of complex software solutions like the ones in the smart grid domain. The proposed solution is academically validated and it can be used as a final important step in migration of existing software to cloud based multi-tenant SaaS.</p>