Database Insights

Design Cassandra tables for time-series data that scale to billions of rows. Learn partition key design, clustering columns, TTL tombstone management, and bucket strategies.

Compare database sharding strategies: hash sharding for even distribution, range sharding for locality, and directory-based for flexibility. When to shard and alternatives.

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

An honest comparison of MongoDB and PostgreSQL in 2026 — document model vs relational model, JSONB as a document store, ACID transaction trade-offs, horizontal scaling, licensing, and migration paths.

TiDB's write path crosses multiple layers — SQL parser, planner, TiKV region leader, Raft log replication, and 2PC commit — before a transaction is durable. Here's a complete walkthrough.

Understand MySQL query execution from parser to storage. Learn optimizer internals, execution plans, buffer management, and physical storage organization.

Use Apache Flink CDC to capture MySQL and PostgreSQL changes — stateful processing, exactly-once semantics, and Kubernetes deployment

Compare vector database options for AI workloads — pgvector in PostgreSQL, Pinecone, Weaviate, and Qdrant

Compare CockroachDB, Google Spanner, and YugabyteDB — consistency models, PostgreSQL compatibility, and operational costs

Deploy Vitess for horizontal MySQL sharding — VSchema design, vtgate routing, and migration from single-instance MySQL

Compare streaming and batch data processing — latency, throughput, tooling, and when each approach makes sense

A production guide to PostgreSQL Row Level Security — policy creation, USING vs WITH CHECK clauses, performance implications with indexes, and multi-tenant SaaS patterns with real schema examples.