---
title: "Discussion on \"From fingerprints to an incident: counting in windows, paging once\" | Hashnode"
description: "Discussion on \"From fingerprints to an incident: counting in windows, paging once\". A fingerprint names a bug; ten of them inside five minutes is an incident. How log0's clustering service counts in tumbling event-time windows, emits exactly once per window, and the two failure modes of an in-memory store with no eviction."
url: "https://hashnode.com/posts/from-fingerprints-to-an-incident-counting-in-windows/6a684e112d9f8d79ccbeb755"
---

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# [From fingerprints to an incident: counting in windows, paging once](https://engineeringwithashmit.hashnode.dev/from-fingerprints-to-an-incident-counting-in-windows?utm_source=hashnode&utm_medium=feed)

A fingerprint names a bug; ten of them inside five minutes is an incident. How log0's clustering service counts in tumbling event-time windows, emits exactly once per window, and the two failure modes of an in-memory store with no eviction.

Jul 28 · 11 min read · engineeringwithashmit.hashnode.dev  
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-   [#kafka](https://hashnode.com/tag/kafka)
-   [#system-design](https://hashnode.com/tag/system-design)
-   [#observability](https://hashnode.com/tag/observability)
-   [#incident-management](https://hashnode.com/tag/incident-management)
-   [#stream-processing](https://hashnode.com/tag/stream-processing)

## Written by

[Ashmit JaiSarita Gupta](https://hashnode.com/@ashmitjsg)

@ashmitjsg · Noida, India

  
[View profile](https://hashnode.com/@ashmitjsg)

Web Development | Quantum Computing | Machine Learning | Tech Community

Software Development Engineer working on scalable backend systems and developer platforms, with experience in full-stack and quantum computing software development. Open-source contributor and Google Summer of Code mentor. Interested in system design, distributed systems, and quantum computing. I write to simplify System Design, real-world software architecture, and open-source for early-career engineers.

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