Filtered HNSW search, fast mode
Explore the improvements we have made for HNSW vector search in Apache Lucene through our ACORN-1 algorithm implementation.
Concurrency bugs in Lucene: How to fix optimistic concurrency failures
Thanks to Fray, a deterministic concurrency testing framework from CMU’s PASTA Lab, we tracked down a tricky Lucene bug and squashed it
Early termination in HNSW for faster approximate KNN search
Learn how HNSW can be made faster for KNN search, using smart early termination strategies.
Optimized Scalar Quantization: Improving Better Binary Quantization (BBQ)
Here we explain optimized scalar quantization in Elasticsearch and how we used it to improve Better Binary Quantization (BBQ).
Lucene Wrapped 2024
2024 has been another major year for Apache Lucene. In this blog, we’ll explore the key highlights.
Lucene bug adventures: Fixing a corrupted index exception
Sometimes, a single line of code takes days to write. Here, we get a glimpse of an engineer's pain and debugging over multiple days to fix a potential Apache Lucene index corruption.
Smokin' fast BBQ with hardware accelerated SIMD instructions
How we optimized vector comparisons in BBQ with hardware accelerated SIMD (Single Instruction Multiple Data) instructions.
Better Binary Quantization (BBQ) vs. Product Quantization
Why we chose to spend time working on Better Binary Quantization (BBQ) instead of product quantization in Lucene and Elasticsearch.
Better Binary Quantization (BBQ) in Lucene and Elasticsearch
How Better Binary Quantization (BBQ) works in Lucene and Elasticsearch.
RaBitQ binary quantization 101
Understand the most critical components of RaBitQ binary quantization, how it works and its benefits. This guide also covers the math behind the quantization and examples.
Apache Lucene 10 is out! Improvements to Lucene's hardware efficiency & more
Apache Lucene 10 has been released, with a focus on hardware efficiency! Check out the main release highlights.
Elasticsearch vs. OpenSearch: Vector Search Performance Comparison
Elasticsearch is out-of-the-box 2x–12x faster than OpenSearch for vector search