The AI side of the Vespa Search Engine
Vespa implements several useful features for customizing and improving Vector Search. Here, we will go into detail of each of them.
Anna Ruggero
June 19, 2026
Nested Vectors Search in Apache Lucene
When using Lucene’s parent-child block-join mode, you are dealing with a “one-to-many relationship”. You have a single document (parent) owning multiple vector embeddings (children).To search
Anna Ruggero
May 27, 2026
London Information Retrieval & AI Meetup [June 2026]
Let’s announce the twenty-seventh edition of the London Information Retrieval & AI Meetup, a hybrid event about Information Retrieval.
Lisa Biella
May 25, 2026
Sease at Berlin Buzzwords 2026
Berlin Buzzwords 2026 Berlin Buzzwords is Germany’s most exciting conference on storing, processing, streaming and searching large amounts of digital data, with a focus on
Lisa Biella
May 20, 2026
Benchmarking JSON Facet Methods in Apache Solr
This blogpost explores the performance impact of DocValues vs. Inverted Index for Apache Solr facets done through JSON facet API.
Nicolò Rinaldi
May 15, 2026
Colbert Comes to Apache Solr: Implementation and Tutorial of Late Interaction Model Reranking
Discover late interaction in Apache Solr: how to implement ColBERT-style neural reranking to boost search accuracy.
Nicolò Rinaldi
April 1, 2026
Late Interaction Comes to Solr: Neural Reranking Introduction
Discover late interaction in Apache Solr: how to implement ColBERT-style neural reranking to boost search accuracy.
Nicolò Rinaldi
April 1, 2026
Apache Solr 10 – What Is New for Vector Search and LTR
This blog summarises the main new features introduced in Apache Solr 10.0.0, focusing on Vector Search and Learning to Rank (LTR).
Ilaria Petreti
March 30, 2026
Apache Solr New Learning To Rank Cache
A comparison between Solr’s current LTR cache and a new implementation that works not only for logging features, but also for reranking.
Anna Ruggero
March 23, 2026
New in Apache Solr 10: Improved Filtering In Vector Search with ACORN
Hi readers, In this blog post, we are excited to share some important news with you:Sease has contributed a new feature to Apache Solr by
Ilaria Petreti
March 16, 2026
We are Sease, an Information Retrieval Company based in London, focused on providing R&D project guidance and implementation, Search consulting services, Training, and Search solutions using open source software like Apache Lucene/Solr, Elasticsearch, OpenSearch and Vespa.
