Question

Difficulty: MediumDesigning Infrastructure for Technical Requirements and High Availability

A global fintech enterprise is designing its cloud architecture on Google Cloud for a mission-critical order execution platform. The solution requires a relational database capable of handling high-frequency transactional writes with multi-region strong consistency and 99.999% availability SLA. Additionally, the architecture must connect the on-premises trading engine to Google Cloud via a low-latency, dedicated private connection requiring 20 Gbps of bandwidth with high availability. Which TWO architectural decisions should the cloud architect make to satisfy these technical requirements? (Select TWO.)

  1. Deploy multi-region Cloud Spanner database instances to support globally consistent, highly available transactional workloads.Answer
  2. Provision redundant Dedicated Interconnect connections at two distinct edge facilities to establish high-throughput, low-latency hybrid connectivity.Answer
  3. C
    Provision an HA Cloud VPN gateway with multiple active-active IPsec tunnels to aggregate throughput for the 20 Gbps on-premises connection.
  4. D
    Deploy a Cloud SQL for PostgreSQL primary instance with cross-region read replicas to handle multi-region synchronous transactional writes.
  5. E
    Deploy Google Kubernetes Engine (GKE) clusters with single-zone nodepools and manual failover scripts to minimize control plane cost and operational complexity.

Answer

The platform requires deploying multi-region Cloud Spanner instances for globally consistent relational transactions and provisioning redundant Dedicated Interconnect links to meet the 20 Gbps hybrid throughput requirement.
Cloud Spanner satisfies the multi-region relational database requirement with strong consistency and 99.999% SLA. Dedicated Interconnect provides the required 20 Gbps high-bandwidth, low-latency connection between on-premises datacenters and Google Cloud.

Step-by-Step Solution

1
Analyze database requirements
Identify need for relational transactions, global strong consistency, and 99.999% availability SLA.
Cloud Spanner is the native GCP managed relational database that scales horizontally across regions while maintaining strong consistency and 99.999% availability.
2
Analyze connectivity and bandwidth requirements
Identify 20 Gbps private hybrid bandwidth requirement with low latency and high redundancy.
HA Cloud VPN is limited to 3 Gbps per tunnel. Dedicated Interconnect supports 10 Gbps or 100 Gbps circuits and is designed for high-capacity, low-latency hybrid infrastructure.

Key Concept

Designing multi-region high availability architectures using Cloud Spanner for globally consistent data and Dedicated Interconnect for high-bandwidth hybrid networking.
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