The JusDB Database Engineering Blog

Downgrading MongoDB requires careful planning — setting the Feature Compatibility Version before replacing binaries, handling replica set members in sequence, and verifying data integrity throughout.

MongoDB's indexing system supports single-field, compound, multikey, text, geospatial, and partial indexes. Choosing the right index type and key order determines whether your queries use microseconds or seconds.

MongoDB's mongosync utility enables continuous, real-time synchronization between two MongoDB clusters — simplifying live migrations, multi-cloud replication, and DR setups.

Hatchet transforms raw MongoDB JSON logs into actionable insights — surfacing slow operations, connection storms, and namespace hotspots that are impossible to spot in raw log files.

Use Neo4j for relationship-heavy data — Cypher query language, graph algorithms, and fraud detection use cases

Build full-text search with MongoDB Atlas Search — analyzers, scoring, autocomplete, and relevance tuning

Achieve microsecond latencies at scale with Aerospike. Learn hybrid memory architecture, strong consistency, cross-datacenter replication, and use cases for AdTech and fraud detection.

A practical guide to Redis use cases in production — cache-aside pattern, sliding window rate limiting, Pub/Sub vs Streams, BRPOP queues with delayed job scheduling, and session storage with persistence configuration.

Process DynamoDB Streams with Lambda for change data capture, cross-region replication, and event sourcing

Running MongoDB without TLS exposes your data to network interception and man-in-the-middle attacks. Here's how to configure TLS/SSL across your MongoDB replica set.

Understand FoundationDB's architecture — ACID transactions, layers, and why Snowflake and Apple chose it

Master Apache Cassandra for planet-scale, always-on applications. Learn ring architecture, consistency levels, data modeling, compaction strategies, and multi-datacenter replication.