The JusDB Database Engineering Blog

Eliminate stale cache reads and thundering-herd stampedes by streaming MySQL binlog changes to Valkey via Debezium CDC. Full Java setup with embedded engine and XFetch.

Compare Redis RDB snapshots and AOF logging — durability trade-offs, performance impact, and recovery scenarios

Configure Redis Cluster for horizontal scaling — hash slots, replication, failover, and client-side routing

Redis Sentinel and Redis Cluster both provide HA, but teams regularly choose the wrong one. Sentinel is simpler and covers 95% of use cases; Cluster is required for horizontal scale. Here's when to choose each.

Understand why MySQL removed the query cache in 8.0 and what to use instead: application-level Redis caching, ProxySQL query cache, and pre-computed summary tables.

Redis Streams and Kafka both handle millions of events per second, but they solve different problems. Compare latency, retention, delivery guarantees, and operational overhead to choose the right architecture.

Use Redis Streams for event sourcing and message queues. Covers XADD, XREADGROUP, consumer groups, XAUTOCLAIM for stale messages, and Python producer/consumer examples.

Choose Redis 8 or Valkey 8 from licensing, feature, managed-service, and operational requirements, then migrate within the documented compatibility boundary.

Understand the Redis fork landscape after licensing changes. Compare Redis and Valkey features, licensing implications, migration paths, and community support.

Migrate from Redis to Valkey — compatibility, performance benchmarks, and what changes for operators

A practical guide to choosing between read replicas and caching layers — replication lag behavior, cache invalidation strategies, thundering herd prevention, tiered read architecture patterns, and decision framework.

Tune Redis from measured latency and memory behavior: bound command work, fix big and hot keys, choose eviction intentionally, and test persistence.