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How Databases Work: From File Cabinets to Vector Search
A beginner-to-deep guide to how databases store, index, and protect data, plus a family map of relational, key-value, document, graph, vector, and time-series engines, and how to choose.
A Lightweight Overhaul of MemoryHub in Practice: Cutting from 10 Databases to 5, and RAM from 6.2GB to 500MB
What happens when you delete Neo4j, Elasticsearch, and MongoDB from an AI memory system, keep only the Qdrant + FAISS + SQLite-vec trio, and replace the 9.1GB BGE-m3 with a 193MB bge-small-zh? A complete performance dissection, an embedding model comparison, and a trimming plan aimed at ordinary computers.
Complete Comparison of Top 10 Vector and Full-Text Databases: MemoryHub Backend Storage Selection Guide
An in-depth review of ten databases, including Qdrant, Chroma, LanceDB, SQLite-vec, FAISS, Redis, PostgreSQL (pgvector), Elasticsearch, MongoDB Atlas, and Neo4j, in AI memory system scenarios, covering performance, deployment difficulty, resource consumption, and use cases.