31 articles
A practical guide to vector databases -- how embeddings and ANN algorithms work, and an honest comparison of Pinecone, Weaviate, Qdrant, and pgvector.
CQRS separates read and write models for independent optimization. Event Sourcing stores every state change as an immutable event. Learn when each pattern solves real problems, with TypeScript implementations, projection examples, and event store comparisons.
The CAP theorem forces a trade-off between consistency and availability during network partitions. Learn how PostgreSQL, Cassandra, DynamoDB, and other databases handle this trade-off, plus the PACELC extension that captures what CAP misses.
A complete guide to PostgreSQL index types. Learn when to use B-Tree, Hash, GIN, GiST, BRIN, and partial indexes with real SQL examples, EXPLAIN ANALYZE verification, and index maintenance strategies.
SQL injection remains a top vulnerability. Learn how SQLi works, why ORMs are not enough, and how to prevent it with parameterized queries and defense in depth.
A practical comparison of SQL and NoSQL databases. Covers MongoDB, Redis, DynamoDB, Cassandra, and Neo4j vs PostgreSQL with real trade-offs, code examples, and a decision framework for choosing the right database.
A practical guide to time-series databases. Compare TimescaleDB, InfluxDB, Prometheus, and ClickHouse. Learn TSDB architecture, compression, downsampling, and when to upgrade from plain PostgreSQL.
A practical guide to database sharding and partitioning in PostgreSQL. Covers range, list, and hash partitioning, consistent hashing, cross-shard queries, resharding, and when to choose each strategy.
A complete guide to PostgreSQL streaming replication. Covers WAL shipping, synchronous vs asynchronous modes, replica lag monitoring, failover with Patroni, and physical vs logical replication trade-offs.
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