Apache Kafka Tutorial 0/111 lessons ~6 min read Lesson 94

    Kafka System Design

    What is Kafka System Design?

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    Focus
    8 guided sections
    Practice signal
    Examples included
    Career prep
    Foundation builder

    Introduction

    What is Kafka System Design? Sizing, keys, retention, failure diagrams for interviews.

    Understanding the topic

    What happens — Kafka System Design:

    • Sizing, keys, retention, failure diagrams for interviews
    • Sizing, keys, retention, failure diagrams for interviews.
    • Govern schemas and ownership.
    • Measure lag, cost, and SLOs.
    TermDescription
    KafkaSizing, keys, retention, failure diagrams for interviews
    OwnershipTeam responsible for topic SLO.
    SLOLag, availability, durability targets.
    RunbookSteps for common incidents.

    Visual explanation

    Pipeline view:

    text
    Requirements → keys → partitions → capacity → ops

    Step-by-step explanation

    1. Assess — Current pain and requirements.
    2. Design — Architecture and contracts.
    3. Implement — Platform guardrails.
    4. Operate — Monitor and iterate.

    Execution workflow

    1Kafka System Design workflow
    1 / 4

    Assess

    Current pain and requirements.

    Best practices

    • Simulate consumer outage vs retention.
    • Phase rollout from MVP topic.

    Common mistakes

    • Cross-AZ traffic cost ignored.
    • Hot keys on one partition.

    Summary

    Kafka System Design — Back-of-envelope: peak MB/s × RF × retention = storage.

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