Vector databases are crucial for modern AI apps like recommendation systems and language models.This article focuses on building an AWS scalable vector database efficiently.Vector databases store high-dimensional embeddings for unstructured data like text, images, and audio.Vector search uses techniques like HNSW, FAISS, and Annoy to find similar items efficiently.Challenges in scaling vector databases include cost, indexing performance, storage, and query latency.Using AWS services like OpenSearch, Aurora, and DynamoDB can help in building scalable vector search pipelines.Creating vector embeddings from AI models like BERT and indexing them is essential for vector databases.Optimizing indexing parameters, using parallelism, and optimizing costs are key considerations for performance.AWS Lambda, Amazon SageMaker, and Graviton-powered EC2 instances can aid in optimizing costs.Amazon OpenSearch, Aurora with pgvector, and DynamoDB are recommended for AI-driven apps on AWS.