OpenTelemetry Foundations: Back to Basics — What Is a Signal? (Part 1)

 Posted on 13 Oct 2025  (Last modified on 21 Oct 2025)  |  12 minutes  |  2458 words  |  Gelerion

OpenTelemetry isn’t magic—it’s just structured data objects. Part 1 demystifies OTel signals: spans for request timelines, metrics for trends and SLOs, logs for context. Learn about attributes vs events, histogram buckets, cardinality traps, and the unified context that ties it all together. [Read More]
OpenTelemetry  OTel  Observability  Traces  Metrics  Logs  Histograms  Cardinality 

Spark and Data Sketches: Taming count-distinct

 Posted on 09 Jul 2023  (Last modified on 21 Oct 2025)  |  8 minutes  |  1628 words  |  Gelerion

Distinct counting is a commonly used metric in trend analysis to measure popularity or performance. Although it may seem like a simple problem, the challenge quickly grows as the amount of data grows. Counting the exact number of distinct values can consume a significant amount of resources while taking a long time even when using a parallelized processing engine. To address this challenge, you can use probabilistic algorithms [Read More]
spark  streaming  data-sketches  analytics  probabilistic-algorithms 

Common Pitfalls to Avoid When Publishing Artifacts on Maven Central

 Posted on 30 Apr 2023  (Last modified on 21 Oct 2025)  |  2 minutes  |  420 words  |  Gelerion

Are you planning to publish your first artifact to Maven Central and make it available to a wider audience? Congratulations, you’re taking an important step in contributing to the open-source community! However, the process may not be as straightforward as you expect. In this post, we’ll go over some common pitfalls to avoid to make your publishing experience smoother. [Read More]
maven  gpg