To ensure maximum resilience, what deployment strategy should a company use for an e-commerce application?

For an e-commerce application, ensuring maximum resilience involves using a deployment strategy that mitigates the risk of downtime due to localized failures or disasters. Selecting multiple regions combined with availability domains provides a robust framework for achieving high availability and disaster recovery.

Multiple regions allow the application to operate in entirely different geographical locations, thus safeguarding against large-scale disasters that could impact an entire region, such as natural disasters or significant power outages. This geographical diversity ensures that if one region faces issues, the application can seamlessly failover to another region.

Incorporating availability domains within those regions adds another layer of resilience. Availability domains are isolated from each other within the same region, so if one availability domain experiences downtime, the others remain operational. This means that critical components of the e-commerce application can continue to function without interruption even if problems arise in one availability domain.

Together, the strategy of using multiple regions and availability domains provides a comprehensive approach to resilience, ensuring that applications can handle various types of failures while maintaining high availability and minimal disruption for users. This setup is especially vital for e-commerce applications, where uptime is critical for revenue and customer satisfaction.