InfoQ Homepage Event Driven Architecture Content on InfoQ
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Cloud Native Computing Foundation Graduation of CloudEvents: Q&A with Clemens Vasters
Earlier this year, the Cloud Native Computing Foundation (CNCF) announced that CloudEvents had graduated. CloudEvents is a specification designed to expose event metadata in a standardized manner, which helps to ensure interoperability across platforms, services, and systems.
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Building a Platform to Gain an Unexpected Competitive Advantage: Ranbir Chawla at QCon London
During his QCon London presentation, Ranbir Chawla presented the journey his team took from moving from an “architectural perfect storm” and a highly manual operational system to a product company with a modern event-based architecture that can be released in < 1 hour. The company now focuses on providing real business outcomes to its stakeholders, and ensuring developers find joy in their work.
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QCon London: How Duolingo Sent 4 Million Push Notifications in 6 Seconds During the Super Bowl Break
As part of the Super Bowl marketing campaign, Duolingo sent out 4 million mobile push notifications when the company’s five-second ad aired during the commercial break. At QCon London, Doulingo’s engineers presented the asynchronous AWS architecture responsible for broadcasting messages to millions of users across seven US cities.
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Hashnode Creates Scalable Feed Architecture on AWS with Step Functions, EventBridge and Redis
Hashnode created a scalable event-driven architecture (EDA) for composing feed data for thousands of users. The company used serverless services on AWS, including Lambda, Step Functions, EventBridge, and Redis Cache. The solution leverages Step Functions' distributed maps feature that enables high-concurrency processing.
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Uber Builds Scalable Chat Using Microservices with GraphQL Subscriptions and Kafka
Uber replaced a legacy architecture built using the WAMP protocol with a new solution that takes advantage of GraphQL subscriptions. The main drivers for creating a new architecture were challenges around reliability, scalability, observability/debugibility, as well as technical debt impeding the team’s ability to maintain the existing solution.
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Pinterest Open-Sources a Production-Ready PubSub Java Client for Kafka, Flink, and MemQ
Pinterest open-sourced its generic PubSub client library, PSC, which has been heavily used in production for a year and a half. The library helped the engineering teams by increasing developer velocity, and the scalability and stability of services using it. Over 90% of Java applications have migrated to PSC with minimal changes.
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Instacart Creates Real-Time Item Availability Architecture with ML and Event Processing
Instacart combined machine learning with event-based processing to create an architecture that provides customers with an indication of item availability in near real-time. The new solution helped to improve user satisfaction and retention by reducing order cancellations due to out-of-stock items. The team also created a multi-model experimentation framework to help enhance model quality.
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Discord Scales to 1 Million+ Online MidJourney Users in a Single Server
Discord optimized its platform to serve over one million online users in a single server while maintaining a responsive user experience. The company evolved the guild component, which is responsible for fanning out billions of message notifications, in a series of performance and scalability improvements supported by system observability and performance tuning.
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Real-Time Data Streaming Capabilities with AppSync Integration in Amazon EventBridge Event Bus
AWS recently announced that Amazon EventBridge Event Bus supports AWS AppSync as an Event Bus's target, enabling developers to stream real-time updates such as sports scores from their applications to frontend applications, including mobile and desktop.
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Expedia Uses WebSockets and Kafka to Query Near Real-Time Streaming Data
Expedia created a solution to support querying the clickstream data from their platform in near-real time to enable their product and engineering teams to explore live data while working on new and enhancing existing data-driven functional use cases. The team used a combination of WebSockets, Apache Kafka, and PostgreSQL to allow streaming query results continuously to users’ browsers.
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How HubSpot Uses Apache Kafka Swimlanes for Timely Processing of Workflow Actions
HubSpot adopted routing messages over multiple Kafka topics (called swimlanes) for the same producer to avoid the build-up in the consumer group lag and prioritize the processing of real-time traffic. Using a combination of automatic and manual detection of traffic spikes, the company ensures the majority of customers’ workflows execute without delays.
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Goldsky’s Streaming-First Architecture for Blockchain Data with Flink, Redpanda and Kubernetes
Goldsky created a platform for the real-time processing of blockchain data. The platform allows clients to extract data from blockchains into their own databases to support product features, but without running the data pipeline infrastructure. The event-driven architecture (EDA) of Goldsky leverages Apache Flink, Redpanda, Kubernetes, and cloud provider services.
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Distributed Materialized Views: How Airbnb’s Riverbed Processes 2.4 Billion Daily Events
Airbnb created Riverbed, a Lambda-like data framework for producing and managing distributed materialized views. The framework supports over 50 read-heavy use cases where data is sourced from multiple data sources within the company’s service-oriented architecture (SOA) platform. It uses Apache Kafka and Apache Spark for online and offline components, respectively.
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Confluent Announces Apache Flink on Confluent Cloud in Open Preview
Confluent recently announced the open preview of Apache Flink on Confluent Cloud as a fully-managed service for stream processing. The company claims that the managed service will make it easier for companies to filter, join, and enrich data streams with Flink.
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Allegro Uses Control Theory for Workload Balancing in its Apache Kafka PubSub Platform
Allegro, the largest eCommerce platform in Poland, implemented dynamic workload balancing in Hermes, its open-source publish-subscribe message broker, built on top of Apache Kafka. The new workload balancing algorithm achieves more uniform resource utilization and lower infrastructure costs.