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    For SREs and platform engineers

    Rehearse the outage before it pages you.

    Play Kafka Play Redis

    First chapter free with a free account. Nothing to install.

    Start with these 12.

    Kafka: Siege

    1. Wave 03 Replication and the ISR, Controller and leader electionChaos Monkey Free
    2. Wave 11 Rack awarenessZone Down
    3. Wave 12 Rolling restartsPatch Tuesday
    4. Wave 13 The KRaft controller quorumSplit Brain
    5. Wave 14 Gray failureGray Failure
    6. Wave 28 Disaster recovery and MirrorMaker 2Region Down

    Redis: Voxel Defense

    1. Lesson 19 Asynchronous replication, offsets, and backlogMirrors
    2. Lesson 21 AOF policies and rewrite overheadWrite Journal
    3. Lesson 23 Sentinel discovery, quorum, and failover authorizationSentinel Watch
    4. Lesson 29 Cluster majority, coverage, and failure domainsSplit Horizon
    5. Lesson 51 Operational measurements and causal diagnosisRead the Signals
    6. Lesson 52 Planned maintenance and readiness before cutoverUpgrade Lane

    The first chapter takes a few minutes.

    Play Kafka Play Redis

    Also for: Engineers who build with AI, Backend engineers new to Kafka or Redis, System design interviews