Practical articles on AI, DevOps, Cloud, Linux, and infrastructure engineering.
We run our app in two AWS regions for failover. The hard parts aren't the deployment — they're data consistency, traffic shifting, and the assumptions that break when "primary" is suddenly the wrong region.
A real story of removing console-only changes, adding drift detection, and getting Terraform back in charge.
We run ~200 Lambda functions. Cold starts, memory tuning, and the cost-vs-latency trade-offs that actually move the bill.
Concrete systemd unit patterns that reduced flakiness: restart policies, resource limits, and structured logs.
How a small team moved from single-region risk to a simple active/passive multi-region setup without doubling complexity.
Design for region failure. Active/passive and active/active, data replication, and failover testing.
