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Thomas Veasey

Author’s articles

What is semantic reranking and how to use it?

What is semantic reranking and how to use it?

Learn about the trade-offs using semantic reranking in search and RAG pipelines.

Evaluating search relevance part 2 - Phi-3 as relevance judge

September 19, 2024

Evaluating search relevance part 2 - Phi-3 as relevance judge

Using the Phi-3 language model as a relevance judge, with tips & techniques to improve the agreement with human-generated annotation

Evaluating search relevance part 1 - The BEIR benchmark

July 16, 2024

Evaluating search relevance part 1 - The BEIR benchmark

Learn to evaluate your search system in the context of better understanding the BEIR benchmark, with tips & techniques to improve your search evaluation processes.

Evaluating scalar quantization in Elasticsearch

May 3, 2024

Evaluating scalar quantization in Elasticsearch

Learn how scalar quantization can be used to reduce the memory footprint of vector embeddings in Elasticsearch through an experiment.

Understanding Int4 scalar quantization in Lucene

April 25, 2024

Understanding Int4 scalar quantization in Lucene

This blog explains how int4 quantization works in Lucene, how it lines up, and the benefits of using int4 quantization.

Scalar quantization optimized for vector databases

April 25, 2024

Scalar quantization optimized for vector databases

Optimizing scalar quantization for the vector database use case allows us to achieve significantly better performance for the same retrieval quality at high compression ratios.

Speeding Up Multi-graph Vector Search

March 12, 2024

Speeding Up Multi-graph Vector Search

Explore multi-graph vector search in Lucene and discover how sharing information between segment searches enhances search speed.

RAG evaluation metrics: A journey through metrics

December 1, 2023

RAG evaluation metrics: A journey through metrics

Explore RAG evaluation metrics like BLEU score, ROUGE score, PPL, BARTScore, and more. Discover how Elastic is evaluating RAG with UniEval.

Improving information retrieval in the Elastic Stack: Improved inference performance with ELSER v2

October 17, 2023

Improving information retrieval in the Elastic Stack: Improved inference performance with ELSER v2

Learn about the improvements we've made to the inference performance of ELSER v2, achieving a 60% to 120% speed increase over ELSER v1.

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