High Performance And Low Overhead Graphs With KuzuDB

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Aug 18, 2025

Prashanth Rao, an AI engineer at KuzuDB, delves into the cutting-edge features of their embeddable graph database. He explains how KuzuDB tackles performance issues with innovative columnar storage and unique join algorithms. The conversation reveals KuzuDB's potential for enhancing graph applications, especially in edge computing and ephemeral workloads. Prashanth also discusses the growing interest in graph databases for AI integration and how Kuzu can seamlessly work with other data formats like Iceberg and Parquet.

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INSIGHT

Zero‑Copy Indexing Over External Tables

Kuzu can scan external table formats and ingest into its native indices, but zero‑copy modes are being explored to index without copying data.
Zero‑copy would keep data in the primary source while Kuzu maintains indices on top.

INSIGHT

Arrow And Parquet Drive Fast Ingestion

Kuzu leverages the Arrow/Parquet ecosystem to ingest large datasets efficiently via columnar batches and data frames.
Strong typing and Arrow integration let Kuzu apply compression and fast batch ingestion from Polars and Parquet.

INSIGHT

New Joins And Factorization Accelerate Queries

Columnar storage enables vectorized, morsel‑driven parallelism and factorized intermediate results to greatly speed graph queries.
Kuzu's planner fuses binary and worst‑case‑optimal joins to optimize both acyclic and cyclic queries.

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Summary
In this episode of the Data Engineering Podcast Prashanth Rao, an AI engineer at KuzuDB, talks about their embeddable graph database. Prashanth explains how KuzuDB addresses performance shortcomings in existing solutions through columnar storage and novel join algorithms. He discusses the usability and scalability of KuzuDB, emphasizing its open-source nature and potential for various graph applications. The conversation explores the growing interest in graph databases due to their AI and data engineering applications, and Prashanth highlights KuzuDB's potential in edge computing, ephemeral workloads, and integration with other formats like Iceberg and Parquet.

Announcements

Hello and welcome to the Data Engineering Podcast, the show about modern data management
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Your host is Tobias Macey and today I'm interviewing Prashanth Rao about KuzuDB, an embeddable graph database

Interview

Introduction
How did you get involved in the area of data management?
Can you describe what KuzuDB is and the story behind it?
What are the core use cases that Kuzu is focused on addressing?
- What is explicitly out of scope?
Graph engines have been available and in use for a long time, but generally for more niche use cases. How would you characterize the current state of the graph data ecosystem?
You note scalability as a feature of Kuzu, which is a phrase with many potential interpretations. Typically horizontal scaling of graphs has been complicated, in what sense does Kuzu make that claim?
Can you describe some of the typical architecture and integration patterns of Kuzu?
- What are some of the more interesting or esoteric means of architecting with Kuzu?
For cases where Kuzu is rendering a graph across an external data repository (e.g. Iceberg, etc.), what are the patterns for balancing data freshness with network/compute efficiency? (e.g. read and create every time or persist the Kuzu state)
Can you describe the internal architecture of Kuzu and key design factors?
- What are the benefits and tradeoffs of using a columnar store with adjacency lists vs. a more graph-native storage format?
What are the most interesting, innovative, or unexpected ways that you have seen Kuzu used?
What are the most interesting, unexpected, or challenging lessons that you have learned while working on Kuzu?
When is Kuzu the wrong choice?
What do you have planned for the future of Kuzu?

Contact Info

Parting Question

From your perspective, what is the biggest gap in the tooling or technology for data management today?

Links

The intro and outro music is from The Hug by The Freak Fandango Orchestra / CC BY-SA