All At Once Deployment
All At Once Deployment is a software deployment strategy where the entire application or system is updated simultaneously across all servers or environments, typically with a brief period of downtime. This approach involves replacing the old version completely with the new version in one go, often during scheduled maintenance windows. It contrasts with incremental deployment methods like rolling or canary deployments, which update parts of the system gradually.
Developers should use All At Once Deployment when simplicity and speed are prioritized, such as for small applications, internal tools, or systems where downtime is acceptable during off-peak hours. It's suitable for scenarios with minimal risk tolerance for partial failures, as it ensures all components are updated consistently at once, reducing complexity in version management. However, it's less ideal for large-scale, mission-critical systems requiring high availability, where gradual deployment strategies are preferred to minimize user impact.