Hybrid search represents a paradigm shift in information retrieval. By combining traditional lexical (keyword-based) search with modern vector (semantic) search, we can achieve results that are both precise and contextually relevant. Lexical search excels at exact matches — when a…

The search engine landscape in 2026 has evolved significantly. Both Apache Solr and Elasticsearch remain dominant players, but their strengths have diverged. Apache Solr, now with native KNN vector search and the {!bool} query parser for hybrid search, excels in…

After building and operating a web crawler that processes millions of pages, here are the architectural decisions that matter most. The crawler uses a multi-worker architecture: a coordinator distributes URLs from a priority queue, and workers fetch pages concurrently. Each…

Building a WordPress plugin that passes the WordPress.org review requires strict adherence to coding standards, security best practices, and performance optimization. Security essentials: 1) Nonces on every form (wp_nonce_field/wp_verify_nonce). 2) Capability checks (current_user_can) on every admin action. 3) Sanitize

A practical guide to building fast, scalable search engines using Apache Solr with real-world examples.