[Solved] Why does Schema Registry use schema IDs instead of storing full schemas with every Kafka message? - Ans: To reduce message size and improve performance by referencing schemas | Kafka

Kafka - Schema Registry

Why does Schema Registry use schema IDs instead of storing full schemas with every Kafka message?

ATo reduce message size and improve performance by referencing schemas

BBecause Kafka cannot handle JSON data directly

CTo encrypt schemas for security reasons

DTo allow multiple schemas per message

Step-by-Step Solution

Solution:

Step 1: Understand schema ID usage
Schema Registry assigns unique IDs to schemas so messages only carry the ID, not the full schema, reducing message size.
Step 2: Evaluate other options
Kafka can handle JSON; encryption is separate; multiple schemas per message is not supported.
Final Answer:
To reduce message size and improve performance by referencing schemas -> Option A
Quick Check:
Schema IDs reduce message size and boost performance [OK]

Quick Trick: Schema IDs keep messages small and fast [OK]

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Why does Schema Registry use schema IDs instead of storing full schemas with every Kafka message?