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Auflistung nach Schlagwort "System architecture"

1 - 3 von 3
  • Zeitschriftenartikel
    Preserving Recomputability of Results from Big Data Transformation Workflows
    (Datenbank-Spektrum: Vol. 17, No. 3, 2017) Kricke, Matthias; Grimmer, Martin; Schmeißer, Michael
    The ability to recompute results from raw data at any time is important for data-driven companies to ensure data stability and to selectively incorporate new data into an already delivered data product. However, data transformation processes are heterogeneous and it is possible that manual work of domain experts is part of the process to create a deliverable data product. Domain experts and their work are expensive and time consuming, a recomputation process needs the ability of automatically adding former human interactions. It becomes even more challenging when external systems are used or data changes over time. In this paper, we propose a system architecture which ensures recomputability of results from big data transformation workflows on internal and external systems by using distributed key-value data stores. Furthermore, the system architecture will contain the possibility of incorporating human interactions of former data transformation processes. We will describe how our approach significantly relieves external systems and at the same time increases the performance of the big data transformation workflows.
  • Konferenzbeitrag
    Supporting Semi-Automatic Co-Evolution of Architecture and Fault Tree Models
    (Software Engineering and Software Management 2019, 2019) Getir, Sinem; van Hoorn, André; Kehrer, Timo; Noller, Yannic; Tichy, Matthias
    In this work, we report about recent research results on “Supporting Semi-Automatic Co-Evolution of Architecture and Fault Tree Models”, published in [Ge18]. During the whole life-cycle of software-intensive systems in safety-critical domains, system models must consistently co-evolve with quality evaluation models. However, performing the necessary synchronization steps is a cumbersome and often manual task prone to errors. To understand this problem in detail, we have analyzed the evolution of two representatives of system models and quality evaluation models, namely architecture and fault tree models, for a set of evolution scenarios of a factory automation system called Pick and Place Unit. We designed a set of intra- and inter-model transformation rules which fully cover the evolution scenarios of the case study and which offer the potential to semi-automate the co-evolution process. In particular, we validated these rules with respect to completeness and evaluated them by a comparison to typical visual editor operations. Our results show a significant reduction of the amount of required user interactions in order to realize the co-evolution.
  • Zeitschriftenartikel
    Wege zur Absicherung eines Intranets
    (Informatik-Spektrum: Vol. 22, No. 3, 1999) Rawolle, Joachim; Lassahn, Claus; Schumann, Matthias
    Ziel dieses Artikels ist es, einen Überblick über technische Sicherheitslösungen für Intranets zu geben. Ein Modell, das die Anforderungen an ein Sicherheitssystem in Form von abstrakten Diensten abbildet, dient dazu, verschiedene Lösungsalternativen zur Realisierung der unterschiedlichen Dienste auf Basis offener Standards oder generalisierter Produktklassen beurteilen zu können. Darauf aufbauend wird eine beispielhafte Referenzarchitektur für Unternehmen auf Basis einer X.509 Public-Key-Infrastruktur entworfen.Summary This article describes different technical solutions to obtain a secure intranet. Based on a model that outlines a security system as a set of abstract services, we judge various solutions based on open standards or generalised product categories to implement the different services. Furthermore, an exemplary architecture is suggested, which is based on a X.509 Public-Key-Infrastructure.