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Zorluk: OrtaDeveloping Procedures for Business Continuity and Disaster Recovery Validation

An enterprise online video platform hosts its core subscriber session management service on Google Cloud across a primary region (us-east1) and a DR region (us-west1). The business has established a strict 15-minute Recovery Time Objective (RTO) and near-zero Recovery Point Objective (RPO). As part of developing standard Disaster Recovery (DR) validation procedures, the lead cloud architect needs to design a simulation process that verifies regional failover capability without risking live production traffic or encountering unexpected resource limits during an actual regional outage. Which validation procedure should the cloud architect implement?

  1. Perform scheduled automated failover drills in a isolated staging environment mirroring production, verifying that regional quotas and capacity reservations in us-west1 are validated prior to routing synthetic traffic, while validating automated DNS updates and database replication lag metric bounds.Cevap
  2. B
    Reconfigure the primary database layer to use periodic Cloud Storage snapshot backups and cold-standby restoration procedures during DR drills to minimize regional infrastructure cost.
  3. C
    Simulate failover by instantly shifting live production traffic to us-west1 without prior quota verification or capacity reservations, relying on standard Compute Engine auto-scaling to request quota dynamically during high load.
  4. D
    Replace the high-bandwidth Dedicated Interconnect connection with a single HA VPN tunnel during the failover drill to test cost-optimized hybrid failover routing for metadata synchronization.

Cevap

The correct procedure is to execute scheduled automated failover drills in an isolated staging environment mirroring production, verifying regional quota increases and capacity reservations in us-west1 before running synthetic traffic tests, while validating DNS propagation and replication lag metrics.
Executing scheduled failover tests using synthetic workloads in an isolated staging environment ensures complete validation of DNS propagation, database replication lag, and automated failover scripts. Pre-allocating capacity reservations and auditing regional resource quotas in the target region prevents unexpected deployment failures during failover.

Adım Adım Çözüm

1
Assess DR requirements
Identified strict RTO (15 minutes) and RPO (near-zero) constraints alongside the requirement to prevent live production disruption during testing.
Validation procedures must accurately test failover mechanics without breaking live user traffic or failing due to unverified capacity limits.
2
Evaluate regional capacity and quota validation steps
Pre-validating regional quota bounds and active capacity reservations in the destination region (us-west1) ensures that resource allocation succeeds during failover.
Compute and database auto-scaling cannot exceed established regional GCP quota limits without prior approval.
3
Select optimal synthetic testing framework
Running synthetic workloads in a production-mirrored staging environment validates DNS switchover, routing, and replication lag metrics safely.
Synthetic traffic testing isolated from live users provides realistic failover measurements without incurring customer impact.

Anahtar Kavram

Disaster Recovery Validation & Quota/Capacity Management
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Developing Procedures for Business Continuity and Disaster Recovery Validation