Sunspot: A Solr-Powered Search Engine for Ruby | Linux Magazine
As your site amasses content — be it stories, SKUs, or statistics — a tailored, effective, and exacting search engine becomes increasingly vital. Imagine a bookstore that doesn’t index its tomes by title or author, or a clothing retailer that doesn’t index garments by size. Without search, each site is useless. In general, the quality and relevance of search results makes or breaks a site.