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Simon Cooper

Principal Software Engineer I

Articles by Simon Cooper
Vector DatabaseInside Elastic

How we built Elasticsearch simdvec to make vector search one of the fastest in the world

How we built Elasticsearch simdvec, the hand-tuned SIMD kernel library behind every vector search query in Elasticsearch.

Chris Hegarty
Vector Database

Elasticsearch 9.3 adds bfloat16 vector support

Exploring the new Elasticsearch element_type: bfloat16, which can halve your vector data storage.

Simon Cooper
Basics

HNSW graph: How to improve Elasticsearch performance

Learn how to use the HNSW graph M and ef_construction parameters to improve search performance.

Simon Cooper
Vector Database

Using Direct IO for vector searches

Using rescoring for kNN vector searches improves search recall, but can increase latency. Learn how to reduce this impact by leveraging direct IO.

Simon Cooper