Tihana Galinac Grbac

Tihana Galinac Grbac, Nikola Domazet

This is part II of the follow-up lecture notes of the lectures given by the authors at the Three \CO" (Composability, Comprehensibility, Correctness) Winter School held in Kov{s}ice, Slovakia, in January 2018, and Summer School held in Budapest, Hungary, in June 2019. In this part we explain the recent network evolution and the concept of virtualization, focusing on the management and orchestration of virtualized network resources. Network Functions Virtualization (NFV) is a new paradigm for changing the way networks are built and operated. Decoupling software implementation from network resources through a virtualization layer introduces a need for developing sets of NFV management and orchestration (MANO) functions. We discuss how this new point of view is highly inspired by the functional programming concepts. We provide examples and exercises on Open Stack virtual technology, and also discuss the challenges and problems inspired by telecommunication industry. Focus is on Reliable operation of Management and Orchestration functions of Virtualized resources. These notes provide an introduction to the subject, with the goal of explaining the necessity for new knowledge and skills in area of network programming. We introduce students with main problems and the network design principles, methods and techniques used for their solution. The worked examples and exercises serve students as the teaching material, from which they can learn how to use functional programming to effectively and efficiently coordinate management and orchestration functions in distributed complex systems using NFV.

Tihana Galinac Grbac

This is part I of the follow-up lecture notes of the lectures given by the authors at the Three \CO" (Composability, Comprehensibility, Correctness) Winter School held in Košice, Slovakia, in January 2018, and Summer School held in Budapest, Hungary, in June 2019. In this part we explain the role of functional programming paradigm in the management of complex software systems, and how the functional programming concepts play important role in the designing such systems. Key prerequisite for implementing functional programming concepts is properly designed system structure following well defined design principles and rules. That is the main goal of this lecture to introduce students with proper system modeling. Furthermore, we also explain how new emerging technologies are designed in such a way that they enforce the development of systems that comply to the design rules inspired by the functional programming. This is extremely important in view of the current network evolution and virtualization concepts, which will require many functional programming concepts in the network services and functions, as will be discussed in part II of these lecture notes. These notes provide an introduction to the subject, with the goal of explaining the problems and the principles, methods and techniques used for their solution. The worked examples and exercises serve students as the teaching material, from which they can learn how to use design principles to model effective system structures. Here we focus on students understanding of importance of effective system structures for coordination of development and management processes that are driven by business goals and further evolution.

Pradeeban Kathiravelu, Tihana Galinac Grbac, Luís Veiga

Service composition is an aggregate of services often leveraged to automate the enterprise business processes. While Service Oriented Architecture (SOA) has been a forefront of service composition, services can be realized as efficient distributed and parallel constructs such as MapReduce, which are not typically exploited in service composition. With the advent of Software\-Defined Networking (SDN), global view and control of the entire network is made available to the networking controller, which can further be leveraged in application level. This paper presents FIRM, an approach for Software-Defined Service Composition by leveraging SDN and MapReduce. FIRM comprises Find, Invoke, Return, and Manage, as the core procedures in achieving a QoS-Aware Service Composition.