Running a vector database on your VPS
Your app and your index sit on the same VPS, so latency is not the problem. Compare pgvector, Qdrant, Chroma and brute force, and size the RAM correctly.
#rag
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Build a RAG pipeline on your own VPS
Chunk, embed, store and retrieve on one VPS. A pgvector schema, HNSW sizing, a local embedding model, and the SQL that proves retrieval works.
Build your own AI agent on a VPS
An AI agent is a loop around a language model that can use tools. Learn the concepts behind building one on your own VPS: the loop, tools, MCP, memory.