Category: Ultra Large Scale Systems
Games aus der Cloud, wo sind wir und wohin geht die Reise?
Was genau ist Cloud Gaming? Cloud Gaming lässt sich mit Remote Desktops, Cloud Computing und Video on Demand Diensten vergleichen. Im Grunde beinhaltet Cloud Gaming das Streamen von Videospielen aus der Cloud zum Endkunden. Dabei erfasst und überträgt der Client seine Nutzereingaben (bspw. Maus, Tastatur, Controller) an den Server. Während dieser wiederum die Gesamtspielweltberechnung sowie…
Optimizing Practical Byzantine Fault Tolerance in Wireless IoT Blockchain Networks
Don’t we all appreciate a little help in our everyday lives? “Alexa, turn on the lights in the living room.”Voice assistants, smart lights and other smart home devices are all part of the Internet of Things (IoT). Those and other possible applications of IoT devices increase continuously and with it the overall number of connected…
Security Strategies and Best Practices for Microservices Architecture
Microservices architectures seem to be the new trend in the approach to application development. However, one should always keep in mind that microservices architectures are always closely associated with a specific environment: Companies want to develop faster and faster, but resources are also becoming more limited, so they now want to use multiple languages and approaches.…
Logging im großen Maßstab mit Grafana Loki
Heutzutage erzeugen die meisten Systeme und Anwendungen Logging-Daten die für Sicherheits- und Überwachungszwecke nützlich sind, z. B. für die Fehlersuche bei Programmierfehlern, die Überprüfung des Systemstatus und die Erkennung von Konfigurationsproblemen oder sogar Angriffen. Treten Ereignisse innerhalb einer Anwendung auf, werden diese von integrierten Protokollierungsfunktionen erfasst und mit zusätzlichen Metadaten aufgezeichnet. Mit dem Wachstum von…
Cascading failures in large-scale distributed systems
Internet service providers face the challenge of growing rapidly while managing increasing system distribution. Although the reliable operation of services is of great importance to companies such as Google, Amazon and Co., their systems fail time and again, resulting in extensive outages and a poor customer experience. In this context, one often encounters so-called cascading…
Monitoring with the Elastic Stack
Netflix, stackoverflow and Linkedin are just a few of the companies activly using the Elastic Stack. Use cases include performance and security monitoring or log analytics. [1] The Elastic Stack consists of different products with the most popular ones being Elasticsearch, Kibana, Logstash and Beats. This article will introduce the different products and explain the…
Corona-Klassenzimmer: Ein Blick auf das Bildungsplattform-Chaos in Deutschland
Es vergeht kaum eine Schulwoche ohne Meldungen über Probleme mit Bildungsplattformen. Schauen wir uns das breite Feld in Deutschland also mal genauer an.
KISS, DRY ‘n SOLID — Yet another Kubernetes System built with Ansible and observed with Metrics Server on arm64
This blog post shows how a plain Kubernetes cluster is automatically created and configured on three arm64 devices using an orchestration tool called Ansible. The main focus relies on Ansible; other components that set up and configure the cluster are Docker, Kubernetes, Helm, NGINX, Metrics Server and Kubernetes Dashboard. Individual steps are covered more or…
Event-driven Architectures
Next to the powerful Request / Response architecture exists another architecture, the event-driven one. How this architecture works, where the differences to Request / Response systems are and how transactions can be realized will be part of this article.
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