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CASE STUDY: RetailMart
Overview: Global e-commerce, 5,000 employees. Legacy monolith on VMware, 20TB Oracle DB on-prem.
Business: Modernize to microservices, 100% uptime during Black Friday (10x traffic), real-time inventory sync, exit data center in 2 years.
Executives:
- CEO: "Innovate faster to beat online-only competitors."
- CFO: "End hardware CAPEX. Move to pure OPEX."
- CTO: "Break monolith safely. Zero downtime during transition."
Tech: Migrate off Oracle to open-source, containerize, secure hybrid connectivity during transition, automated scaling.
Constraints: Zero downtime for storefront, heavy reliance on Oracle stored procedures, all hybrid traffic must be private/encrypted.
Which migration approach should you recommend to safely break down the monolith with zero downtime?
GCP PCA · Question 09 · Domain 5: Managing Implementation and Ensuring Solution and Operations Reliability
CASE STUDY: RetailMart
Overview: Global e-commerce, 5,000 employees. Legacy monolith on VMware, 20TB Oracle DB on-prem.
Business: Modernize to microservices, 100% uptime during Black Friday (10x traffic), real-time inventory sync, exit data center in 2 years.
Executives:
- CEO: "Innovate faster to beat online-only competitors."
- CFO: "End hardware CAPEX. Move to pure OPEX."
- CTO: "Break monolith safely. Zero downtime during transition."
Tech: Migrate off Oracle to open-source, containerize, secure hybrid connectivity during transition, automated scaling.
Constraints: Zero downtime for storefront, heavy reliance on Oracle stored procedures, all hybrid traffic must be private/encrypted.
How should you optimize compute costs while ensuring the platform can handle Black Friday traffic spikes?
CASE STUDY: RetailMart
Overview: Global e-commerce, 5,000 employees. Legacy monolith on VMware, 20TB Oracle DB on-prem.
Business: Modernize to microservices, 100% uptime during Black Friday (10x traffic), real-time inventory sync, exit data center in 2 years.
Executives:
- CEO: "Innovate faster to beat online-only competitors."
- CFO: "End hardware CAPEX. Move to pure OPEX."
- CTO: "Break monolith safely. Zero downtime during transition."
Tech: Migrate off Oracle to open-source, containerize, secure hybrid connectivity during transition, automated scaling.
Constraints: Zero downtime for storefront, heavy reliance on Oracle stored procedures, all hybrid traffic must be private/encrypted.
How should you optimize compute costs while ensuring the platform can handle Black Friday traffic spikes?
Answer options:
Use Preemptible VMs for all GKE node pools to save 80% on compute costs.
Purchase Committed Use Discounts (CUDs) for the baseline traffic and rely on GKE Cluster Autoscaler for the 10x Black Friday spikes.
Provision enough on-demand Compute Engine instances to handle the 10x traffic year-round.
Use Sustained Use Discounts (SUDs) exclusively, as they automatically apply to autoscaled resources.
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