Blue-Green Deployment
Blue-green deployment runs two identical production environments side by side. The live environment (blue) serves traffic while the new version (green) is deployed and warmed in parallel. Cutover is a load-balancer flip, and rollback is the same flip in reverse. The cost is double the compute during the window; the benefit is a zero-downtime, instantly-reversible release path.
Concepts that travel with this one.
Architecture rarely lives in isolation — these are the terms that come up in the same conversation.
Canary Release
A canary release routes a small percentage of production traffic (1%, 5%, 25%) to a new version while the rest stays on the previous one. Metrics — error rate, latency, business KPIs — are compared between the two cohorts in real time. The rollout proceeds only if the canary stays inside its SLO. The point is to catch regressions on real traffic with bounded blast radius.
CI/CD
Continuous Integration / Continuous Delivery is the discipline of automatically building, testing, and shipping every code change. CI catches regressions before they merge; CD removes the manual step between merge and production. TantraDev considers a pipeline 'real' only when a clean commit can reach production without a human gate other than a deployment-window check.
RTO & RPO
Recovery Time Objective (RTO) is how long the business can tolerate the system being down before money is at stake. Recovery Point Objective (RPO) is how much data the business can tolerate losing. The pair is the input to the disaster-recovery design — backups, replicas, failover automation, restore drills. Without an explicit RTO/RPO every architectural choice that touches recoverability is implicit and untestable.
Building a system where Blue-Green Deployment is the load-bearing decision?
30 minutes on the phone, one page in your inbox — what to build, what to skip, what it will cost. You keep the audit even if we are not the right fit.