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The Reliability pillar of the GCP Architecture Framework focuses on building workloads that resist failure, recover quickly when failures occur, and meet availability targets consistently. Reliability is not about preventing all failures — it is about designing systems that tolerate and gracefully handle the inevitable failures that occur in distributed systems.
| Principle | Description |
|---|---|
| Design for failure | Assume every component can and will fail — design accordingly |
| Eliminate single points of failure | Ensure no single component's failure can bring down the entire system |
| Use managed services | Let Google handle the reliability engineering for commodity infrastructure |
| Test reliability | Regularly test failure scenarios — do not wait for production incidents |
| Define clear SLOs | Set explicit reliability targets and measure against them |
Understanding availability targets helps you make informed architecture decisions:
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