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Integrating Vector and Graph Databases: A Deep Dive into Gen AI and LLMs

Integrating Vector and Graph Databases: A Deep Dive into Gen AI and LLMs

By Memgraph
4 min readJune 17, 2024

The webinar featured Connor Shorten, a Research Scientist from Weaviate, and Marko Budiselic, the CTO from Memgraph.

A bit of backstory:

Weaviate is an open-source vector search engine designed to handle vector-based data and provide similar search capabilities at scale. In this webinar session, we’ve explored the nuanced roles of vector databases within modern AI and machine learning frameworks. We’ve covered crucial capabilities of vector databases in managing high-dimensional data spaces and facilitating efficient semantic searches.

This blog post recaps their discussion, focusing on the technical specifics, use cases, and future predictions shaping the landscape of database technology for developers and engineers. To get all the details, watch the full session on our Memgraph YouTube channel:

Talking Point 1: The Importance and Usage of Vector Databases

The webinar discusses the critical role vector databases play in AI and machine learning applications. This is especially true for handling high-dimensional data and supporting tasks like semantic search beyond simple keyword matching.

There’s a shift from keyword search to semantic search. Using vector spaces allows the system to understand and find the "Eiffel Tower" when a user searches for "landmarks in France" due to the semantic relationships encoded in the vectors.

Talking Point 2: Combination of Vector and Graph Databases

We discuss the synergy between vector and graph databases, illustrating how graph embeddings can enhance vector search functionalities. Graph databases can add valuable context and structure, which aids in more precise searching and data retrieval.

Talking Point 3: Technical Insights and Innovations in Vector Databases

Connor went into the back-end optimizations, such as proximity graphs and product quantization, which help scale vector database operations to handle billions of vectors with minimal latency and memory overhead.

The webinar touched on dynamic algorithms and data structures such as HS/W proximity graphs, which are essential for managing the vast datasets common in AI applications.

Talking Point 4: Emerging Trends and Future Predictions

The conversation continues by covering the evolution of vector databases towards supporting generative feedback loops where data generation and indexing are interconnected, allowing databases to update and improve dynamically over time. The future might see innovations in how vector databases manage data compression and query efficiency, making it possible to run complex queries on smaller, less powerful hardware.

Talking Point 5: Best Practices and Strategic Advice

We’ve covered the best practices in implementing vector databases, including schema design considerations and effective data chunking strategies. We see the benefits of open-source participation and community support in enhancing the development and adoption of vector database technologies more and more in the future.

Talking Point 6: Applications and Use Cases

Vector databases are critical in applications like chatbots and other AI-driven technologies. They enhance the retrieval and processing of information to generate responsive and context-aware interactions.

Marko and Connor also discussed how vector databases support advanced recommendation systems by allowing for the implicit querying of user preferences and behaviors, enhancing the relevance of recommendations.


In wrapping up this webinar session, we’ve seen enhancements that vector databases bring to AI-driven applications—for example, optimizing semantic search and embedding complex relational data for more nuanced AI interactions.

Hopefully, this webinar has helped you refine your data strategies to align with the evolving demands of Gen AI and LLMs.

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