Schaaf, Marc
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Publication Cloud computing: serverless(IEEE, 2021) Koschel, Arne; Klassen, Samuel; Jdiya, Kerim; Schaaf, Marc; Astrova, IrinaA serverless architecture is a new approach to offering services over the Internet. It combines BaaS (Backend-as-a-service) and FaaS (Function-as-a-service). With the serverless architecture no own or rented infrastructures are needed anymore. In addition, the company does not have to worry about scaling any longer, as this happens automatically and immediately. Furthermore, there is no need any longer for maintenance work on the servers, as this is completely taken over by the provider. Administrators are also no longer needed for the same reason. Finally, many ready-made functions are offered, with which the development effort can be reduced. As a result, the serverless architecture is very well suited to many application scenarios, and it can save considerable costs (server costs, maintenance costs, personnel costs, electricity costs, etc.). The company only must subdivide the source code of the application and upload it to the provider’s server. The rest is done by the provider.04B - Beitrag KonferenzschriftPublication A look at service meshes(2021) Koschel, Arne; Bertram, Marvin; Bischof, Richard; Schulze, Kevin; Schaaf, Marc; Astrova, IrinaService meshes can be seen as an infrastructure layer for microservice-based applications that are specifically suited for distributed application architectures. It is the goal to introduce the concept of service meshes and its use for microservices with the example of an open source service mesh called Istio. This paper gives an introduction into the service mesh concept and its relation to microservices. It also gives an overview of selected features provided by Istio as relevant to the above concept and provides a small sample setup that demonstrates the core features.04B - Beitrag KonferenzschriftPublication Towards a microservices-based distribution for situation-aware adaptive event stream processing(2019) Schaaf, MarcThis paper presents the central concepts for a microservices-based distribution of event stream processing pipelines as they are part of our situation-aware event stream processing system. For this, we outline changes to our specification language for a clear separation of the stream processing specification from the actual stream processing engine. Based on this separation, we then discuss our mapping approach for the assignment of the pipelines to stream processing nodes.04B - Beitrag KonferenzschriftPublication A service based architecture for situation-aware adaptive event stream processing(2018) Schaaf, MarcThis paper presents the central aspects of a service based architecture for a distributed event stream processing system with an emphasis on its components, as well as related scalability and flexibility considerations. The processing system architecture is designed based on a well-defined situation-aware adaptive event stream processing model and a matching scenario definition language, which allow the definition of such processing scenarios in a processing system independent way.04B - Beitrag KonferenzschriftPublication Towards a timely root cause analysis for complex situations in large scale telecommunications networks(Elsevier, 2015) Schaaf, Marc; Wilke, Gwendolin; Mikkola, Topi; Bunn, Erik; Hela, Ilkka; Wache, Holger; Gatziu Grivas, Stella01A - Beitrag in wissenschaftlicher ZeitschriftPublication Cloud service lifecycle for small and medium-sized enterprises(IEEE, 2015) Giovanoli, Claudio; Gatziu Grivas, Stella; Schaaf, Marc; Astrova, Irina; Koschel, Arne04B - Beitrag KonferenzschriftPublication Intelligent Dynamic Load Management Based on Solar Panel Monitoring(SciTePress, 04.04.2014) Wilke, Gwendolin; Schaaf, Marc; Bunn, Eric; Mikkola, Topi; Ryter, Remo; Wache, Holger; Gatziu Grivas, StellaThe Smart Grid will largely increase the amount of measurement data that needs to be processed on distribution grid level in order to fulfill the promised smart behavior. Many modern information systems are capable of handling the produced data amounts quite well. However they are usually highly specialized systems that are costly to change or limited to very basic analytical tasks. We aim to overcome these limitations by utilizing an optimized event processing based framework that can easily be customized to a certain application scenario. In the paper we outline our approach by applying it to one of our motivational scenarios from the area of intelligent dynamic load management.04B - Beitrag KonferenzschriftPublication Towards a Semantic Foundation of a Cloud Based Event Notification Service(08.05.2013) Schaaf, Marc; Gatziu Grivas, Stella; Koschel, Arne04B - Beitrag KonferenzschriftPublication Event Processing with Dynamically Changing Focus (Doctoral Consortium Paper)(2013) Schaaf, Marc99 - SonstigesPublication Active mechanisms for cloud environments(01.02.2012) Astrova, Irina; Koschel, Arne; Gatziu Grivas, Stella; Schaaf, Marc; Hellwich, Ilja; Kasten, Sven; Vaizovic, Nedim; Wiens, Christoph; Lloret Mauri, Jaime; Martinez, Gregorio; Berntzen, Lasse; Smedberg, ÅsaActive mechanisms are used for the coordination (e.g., scalability) of IT resources in clouds. In this paper, we give an overview of existing technologies and products – viz., OM4SPACE Activity Service, RESERVOIR, Amazon SNS, IBM Tivoli Live Monitoring Service, Zimory and PESA – that can be used for providing active mechanisms in cloud environments. Our overview showed that these technologies and products mainly differ in the architectures they support and the cloud layers they provide.04B - Beitrag Konferenzschrift
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