Core concept
Compute environment (spot/on-demand/Fargate mix). Job queue. Job definition (container + command + resources). Submit jobs → auto-scale + execute.
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How it works
Managed CE simpler but less control. Unmanaged you provide EC2. Multi-node jobs for MPI workloads. Array jobs for parametric.
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Trade-offs + gotchas
Genomics pipelines. Financial risk models. ML training. Video encoding. Any compute-heavy job with clear start/end.