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Vector Database

A vector database is a specialized database designed to store, index, and retrieve unstructured data represented as high-dimensional vectors, enabling efficient semantic search, similarity search, and powering applications such as LLM long-term memory, semantic search, and recommendation systems.

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Vector Database

A vector database (also known as a vector store or vector search engine) is a specialized type of database designed to store, index, and retrieve data represented as high-dimensional vectors. These databases enable efficient semantic and similarity searches, making them essential for modern applications in AI, machine learning, and information retrieval.

Features

  • Storage of High-Dimensional Vectors: Capable of storing fixed-length lists of numbers (vectors) representing data such as text, images, audio, and more.
  • Approximate Nearest Neighbor (ANN) Search: Implements algorithms to quickly retrieve database records most similar to a given query vector.
  • Semantic and Similarity Search: Facilitates searching based on meaning or similarity rather than exact matches.
  • Support for Multi-Modal Data: Can handle vectors derived from diverse data types (text, images, audio, etc.).
  • Integration with Machine Learning: Feature vectors are often computed using machine learning methods, such as feature extraction, word embeddings, or deep learning networks.
  • Use in Retrieval-Augmented Generation (RAG): Supports methods to enhance large language model (LLM) outputs by retrieving relevant context from stored vectors.
  • Recommendation Systems: Enables building recommendation engines by finding semantically similar items.
  • Techniques for High-Dimensional Search:
    • Hierarchical Navigable Small World (HNSW) graphs
    • Locality-sensitive Hashing (LSH) and Sketching
    • Product Quantization (PQ)
    • Inverted Files
    • Combinations of these techniques
  • Scalability and Performance: Designed for efficient search and retrieval in large-scale, high-dimensional datasets.

Common Use Cases

  • Semantic search
  • Similarity search
  • Multi-modal search
  • Recommendation engines
  • Long-term memory for large language models (LLMs)
  • Object detection
  • Retrieval-augmented generation (RAG)

Implementations

Vector databases can be found as standalone products or as features in broader database systems. Examples include:

  • Milvus
  • Pinecone
  • Weaviate
  • Qdrant
  • Elasticsearch
  • OpenSearch
  • MongoDB Atlas
  • Redis Stack
  • Vespa
  • Chroma
  • PostgreSQL with pgvector extension
  • Many others (see Wikipedia article for a comprehensive list)

References

  • Wikipedia: Vector database

Category

  • Concepts & Definitions

Tags

  • vector-databases
  • definition
  • semantic-search
  • similarity-search
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Information

Websiteen.wikipedia.org
PublishedMay 13, 2025

Categories

1 Item
Concepts & Definitions

Tags

4 Items
#vector databases
#definition
#semantic search
#similarity search

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txtai is an open-source AI framework that provides semantic search and vector database capabilities for language model workflows.

Vexvault

Vexvault is an open-source vector database designed for efficient storage, management, and similarity search of high-dimensional vector data.

Awesome papers and technical blogs on vector DB

A curated collection of papers and technical blogs focused on vector databases, semantic-based vector search, and approximate nearest neighbor search (ANN Search). These resources are essential for understanding and building large-scale information retrieval systems and vector databases.

XiaomingX/awesome-vector-database

A curated directory of resources, tools, tutorials, and libraries dedicated to vector databases, focusing on efficient data retrieval, similarity search, and machine learning applications.

Deep Learning for Search

Applied book on using deep learning for search, including dense vector representations, semantic search, and neural ranking, all directly relevant to building applications on top of vector databases.

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