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The data Artisans Blog

Apache Flink, stream processing, event-driven applications, and more.

An Overview of End-to-End Exactly-Once Processing in Apache Flink® (with Apache Kafka, too!)

This post is an adaptation of Piotr Nowojski’s presentation from Flink Forward Berlin 2017. You can find the slides and a recording of the presentation on the Flink Forward Berlin website.Apache Fli...

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Apache Flink® Master Branch Monthly: New in Flink in January 2018

Flink’s major version releases occur every few months, and there’s a constant stream of activity as new features are merged to the Flink master branch in between releases. Keeping an eye on what...

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Streaming Data in the Enterprise Hits a Tipping Point: Our 2018 Predictions

On January 18, 2018 Information Management published an article that we contributed about some of our predictions for this year in the big data and analytics space.The key takeaway is that stream proc...

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Managing Large State in Apache Flink®: An Intro to Incremental Checkpointing

Apache Flink was purpose-built for stateful stream processing. Let’s quickly review: what is state in a stream processing application? I defined state and stateful stream processing in a previous bl...

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Apache Flink® User Survey 2017: A Brief Summary

In November 2017, data Artisans conducted a second-annual Apache Flink user survey. There were a total of 217 responses, and the survey provided of lots of useful insights and feedback about Flink.At ...

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How To Size Your Apache Flink® Cluster: A Back-of-the-Envelope Calculation

A favorite session from Flink Forward Berlin 2017 was Robert Metzger’s “Keep It Going: How to Reliably and Efficiently Operate Apache Flink”. One of the topics that Robert touches on is how to ...

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Apache Flink in 2017: Year in Review

This post originally appeared on the Apache Flink blog. It was reproduced here under the Apache License, Version 2.0. 2017 was another exciting year for the Apache Flink® community, with 3 major v...

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Meet the Engineer: Konstantinos Kloudas

This blog post features my colleague, Konstantinos Kloudas, who is a committer on Apache Flink and works in the Berlin office. He usually goes by Kostas, but we call him Klou, because we have a naming...

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The Curious Case of the Broken Benchmark: Revisiting Apache Flink® vs. Databricks Runtime

Tl;dr For the past few months, Databricks has been promoting an Apache Spark vs. Apache Flink vs. Apache Kafka Streams benchmark result that shows Spark significantly outperforming the other framework...

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Announcing the Apache Flink 1.4.0 Release

This post originally appeared on the Apache Flink blog. It was reproduced here under the Apache License, Version 2.0. The Apache Flink community is pleased to announce the 1.4.0 release. Over the p...

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