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    Answer the follow-up with something you have seen happen.

    Play Kafka Play Redis

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

    Start with these 12.

    Kafka: Siege

    1. Wave 02 Brokers and throughput, Partition reassignmentGrowth Spurt Free
    2. Wave 03 Replication and the ISR, Controller and leader electionChaos Monkey Free
    3. Wave 04 Producer acks, min.insync.replicas, Unclean leader election, Idempotent producerMoney Never Sleeps Free
    4. Wave 07 Keys, partitioners and hot partitionsCelebrity Effect Free
    5. Wave 15 Capacity planningBlack Friday
    6. Wave 28 Disaster recovery and MirrorMaker 2Region Down

    Redis: Voxel Defense

    1. Lesson 04 Cache-aside, misses, and invalidationCache Gate Free
    2. Lesson 05 Cache stampedes and coordinated refreshCold Start Free
    3. Lesson 11 Memory limits and eviction policyMemory Tide
    4. Lesson 14 Concentrated command load and useful capacityOne Hot Key
    5. Lesson 25 Native Cluster, hash slots, and explicit cutoverHash-Slot Layout
    6. Lesson 45 HyperLogLog and approximate distinct unionsCount the Crowd

    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, SREs and platform engineers