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Background: Distributed data-intensive systems are increasingly designed to be only eventually consistent. Persistent data is no longer processed with serialized and transactional access, exposing applications to a range of potential concurrency anomalies that need to be handled by the application itself. Controlling concurrent data access in monolithic systems is already challenging, but the problem is exacerbated in distributed systems. To make it worse, only little systematic engineering guidance is provided by the software architecture community regarding this issue. Aims: In this paper, we report on our study of the effectiveness and applicability of the novel design guidelines we are proposing in this regard. Method: We used action research and conducted it in the context of the software architecture design process of a multi-site platform development project. Results: Our hypotheses regarding effectiveness and applicability have been accepted in the context of the study. The initial design guidelines were refined throughout the study. Thus, we also contribute concrete guidelines for architecting distributed data-intensive systems with eventually consistent data. The guidelines are an advancement of Domain-Driven Design and provide additional patterns for the tactical design part. Conclusions: Based on our results, we recommend using the guidelines to architect safe eventually consistent systems. Because of the relevance of distributed data-intensive systems, we will drive this research forward and evaluate it in further domains. CCS CONCEPTS• Software and its engineering → Software design engineering; Software design tradeoffs; Cloud computing. KEYWORDS eventual consistency, domain-driven design, action research * This is a post-print of an article published in the conference proceedings of the 15th ACM/IEEE International Symposium on Empirical Software Engineering and Measurement (ESEM) (ESEM 21

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Alors que je cherchais une ancienne connaissance sur internet, je suis récemment tombé sur son frère aîné, dentiste en Allemagne. Bien que son cabinet n'ait pas de site, on trouve des avis d'internautes à son sujet. Les uns estiment qu'il est peu raffiné, que c'est une vraie brute. D'autres vantent au contraire sa précaution.Les médecins ont émis et émettent encore des réserves de fond sur les évaluations en ligne de leurs prestations.