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Building reliable messaging systems on Google Cloud requires more than choosing the right service. This lesson consolidates the best practices for Pub/Sub, Cloud Tasks, and Cloud Scheduler into a comprehensive guide covering architecture, reliability, security, performance, cost optimisation, and operational excellence.
| Requirement | Service |
|---|---|
| Fan-out events to multiple services | Pub/Sub |
| Dispatch tasks to a single handler with rate control | Cloud Tasks |
| Schedule recurring jobs | Cloud Scheduler |
| High-volume, cost-sensitive streaming | Pub/Sub Lite |
| Complex stream processing with windowing | Dataflow |
| Simple event-driven reactions | Cloud Functions + Pub/Sub |
| Containerised event handlers | Cloud Run + Pub/Sub (push) |
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