Understand Your Chains: Towards Performance Profile-based Network Service Management

Allocating resources to virtualized network functions and services to meet service level agreements is a challenging task for NFV management and orchestration systems. This becomes even more challenging when agile development methodologies, like DevOps, are applied. In such scenarios, management and orchestration systems are continuously facing new versions of functions and services which makes it hard to decide how much resources have to be allocated to them to provide the expected service performance. One solution for this problem is to support resource allocation decisions with performance behavior information obtained by profiling techniques applied to such network functions and services. In this position paper, we analyze and discuss the components needed to generate such performance behavior information within the NFV DevOps workflow. We also outline research questions that identify open issues and missing pieces for a fully integrated NFV profiling solution. Further, we introduce a novel profiling mechanism that is able to profile virtualized network functions and entire network service chains under different resource constraints before they are deployed on production infrastructure.Comment: Submitted to and accepted by the European Workshop on Software Defined Networks (EWSDN) 201

MeDICINE: Rapid Prototyping of Production-Ready Network Services in Multi-PoP Environments

Virtualized network services consisting of multiple individual network functions are already today deployed across multiple sites, so called multi-PoP (points of presence) environ- ments. This allows to improve service performance by optimizing its placement in the network. But prototyping and testing of these complex distributed software systems becomes extremely challenging. The reason is that not only the network service as such has to be tested but also its integration with management and orchestration systems. Existing solutions, like simulators, basic network emulators, or local cloud testbeds, do not support all aspects of these tasks. To this end, we introduce MeDICINE, a novel NFV prototyping platform that is able to execute production-ready network func- tions, provided as software containers, in an emulated multi-PoP environment. These network functions can be controlled by any third-party management and orchestration system that connects to our platform through standard interfaces. Based on this, a developer can use our platform to prototype and test complex network services in a realistic environment running on his laptop.Comment: 6 pages, pre-prin

Der „Dialog über die Vögel“ von G. LONGOLIUS (Köln 1544). Lateinischer Originaltext, deutsche Übersetzung, Kommentierung

GISBERT LONGOLIUS (*1507 - †1543) lebte zeitweilig und verstarb in Köln, studierte an der Alten Universität Köln und war hier auch später (mit gerade 30 Jahren) Professor (s.u.). Sein in Latein verfasstes Werk „Dialogus de avibus …“ erschien 1544 ebenfalls in Köln, weshalb das Kölner Autorenteam aufmerksam wurde. Die nachfolgende erstmalige Übersetzung ins Deutsche basiert auf dem Band in der Privatbibliothek des Kölner Zoologen Prof. Dr. Dr. HANS ENGLÄNDER († 2011). Das Original befindet sich nunmehr in der Universitätsbibliothek in Köln. Die Übersetzung übernahm dankenswerter Weise der mit dem Erstautor befreundete Drittautor A. PEUSTER († 2013) mit sehr großer Sorgfalt und viel Einfühlsamkeit

Monitoring and debugging using an SDK for NFV-powered telecom applications

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A network service development kit supporting the End-to-End lifecycle of NFV-based telecom services

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DevOps for network function virtualisation: an architectural approach

The Service Programming and Orchestration for Virtualised Software Networks (SONATA) project targets both the flexible programmability of software networks and the optimisation of their deployments by means of integrating Development and Operations in order to accelerate industry adoption of software networks and reduce time-to-market for networked services. SONATA supports network function chaining and orchestration, making service platforms modular and easier to customise to the needs of different service providers, and introduces a specialised Development and Operations model for supporting developers