The Machine

JobManager, TaskManagers, slots, operators, parallelism — and what a job is when nothing is checkpointed

What runs where. A Flink job is a dataflow graph deployed as parallel tasks across TaskManagers, coordinated by a JobManager. GatewayMeter reads the gateway's event stream and counts events per model. You kill a TaskManager and learn the first hard fact: without checkpoints there is nothing to recover from.

Estimated time: 60 minutes

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