System Design, Redis & Distributed Systems
8-10 Years (Tech Lead)
Hard
Production Scenario
How do you design a Scalable Full-Text Search Engine with Elasticsearch / Meilisearch synchronizing with relational databases?
Real-World Scenario / Incident Description
Ensuring search indexes reflect real-time database updates within 1 second without double-writing failures.
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Updated 1 month ago
Change Data Capture (CDC) via Debezium & Kafka
Instead of dual-writing in application code (which risks desynchronization if search fails):
- Database writes to transaction WAL (Binlog).
- Debezium CDC connector tails the Binlog and streams row change events to Kafka.
- An indexing consumer batch writes updates into Elasticsearch / Meilisearch. Guarantees 100% data consistency with sub-second synchronization latency.
Related Concepts:
#Elasticsearch
#Meilisearch
#Change Data Capture
#Debezium
#Search
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