[Solved] Which of the following is the correct way to implement parallel running in a microservices upgrade? — Ans: Deploy new microservice version alongside old one and route a copy of requests... | Microservices

Microservices - Migration from Monolith

Which of the following is the correct way to implement parallel running in a microservices upgrade?

ADeploy new microservice version alongside old one and route a copy of requests to both

BStop old microservice and deploy new one immediately

CDeploy new microservice and ignore old service logs

DRun new microservice only during off-peak hours

Step-by-Step Solution

Solution:

Step 1: Understand deployment in parallel running
Parallel running requires both old and new versions to run simultaneously to compare results.
Step 2: Identify correct routing method
Routing a copy of requests to both versions allows output comparison without disrupting users.
Final Answer:
Deploy new microservice version alongside old one and route a copy of requests to both -> Option A
Quick Check:
Parallel running = deploy both and route requests to both [OK]

Quick Trick: Route requests to both old and new services in parallel [OK]

Common Mistakes:

Master "Migration from Monolith" in Microservices

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Which of the following is the correct way to implement parallel running in a microservices upgrade?