[Solved] You design a microservices system where orders and inventory are separate... To handle eventual consistency, which approach best ensures inventory updates reflect orders correctly despite delays? | Microservices

Microservices - Event-Driven Architecture

You design a microservices system where orders and inventory are separate services. To handle eventual consistency, which approach best ensures inventory updates reflect orders correctly despite delays?

AStore orders and inventory in the same database to avoid syncing

BUse an event log where order service emits events and inventory service processes them asynchronously with retries

CMake inventory service call order service synchronously for every update

DIgnore inventory updates until orders are fully processed

Step-by-Step Solution

Solution:

Step 1: Understand the need for asynchronous communication
Orders and inventory are separate; syncing asynchronously avoids blocking and scales better.
Step 2: Choose event log with retries for reliability
Using an event log lets inventory process order events reliably, handling delays and retries to ensure consistency.
Final Answer:
Use an event log where order service emits events and inventory service processes them asynchronously with retries -> Option B
Quick Check:
Event log + async processing = robust eventual consistency [OK]

Quick Trick: Use event logs with retries for reliable async sync [OK]

Common Mistakes:

MISTAKES

Using synchronous calls causing blocking
Single database reduces microservices benefits
Ignoring updates causes stale inventory

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More Microservices Quizzes

To handle eventual consistency, which approach best ensures inventory updates reflect orders correctly despite delays?

Step 1: Understand the need for asynchronous communication

Step 2: Choose event log with retries for reliability

Final Answer:

Quick Check:

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