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You are designing the architecture for a stateless, public-facing, containerized web application. The marketing department uses this web application to run unpredictable flash sales that cause sudden, massive spikes in user traffic. The application is a critical revenue driver and must always be available and responsive to users. Your design must automatically handle high traffic fluctuations and allow for new application versions to be deployed with zero downtime and a safe, fast rollback capability. What should you do?
Correct Answer: B
For stateless, containerized applications facing " sudden, massive spikes, " Cloud Run is the preferred serverless solution. According to Cloud Run documentation , it offers superior scaling speed compared to VMs or GKE, as it can scale from zero to thousands of instances in seconds based on request-based metrics (concurrency) rather than just CPU utilization. Cloud Run natively supports Revisions , allowing for zero-downtime deployments . You can perform " Blue- Green " or " Canary " deployments by splitting traffic between a new revision and an old one. If a new version fails, the rollback is nearly instantaneous (switching traffic back to the previous revision). Option A (MIGs) scales significantly slower than Cloud Run. Option D (GKE Recreate) involves downtime during deployments, and Option C is a single point of failure that cannot handle traffic spikes.