“Result set scoring offers yet another layer of filtering that looks at a number of entities together and returns a subset of these entities that are most interesting as a set (and not necessarily the highest scoring set of results).”— Sriram Sankar, facebook.com
“Here 273819889375819 is the fbid of the category ‘restaurants,’ and 20531316728 is the fbid of Facebook. So the query says ‘intersect places of category restaurants with places liked by employees of Facebook.”— Sriram Sankar, facebook.com
“1. Come up with an idea for a ranking change – ideas come from a mix of creativity on the part of our ranking engineers and feedback from our users 2. Implement the ranking change, test it, and launch it to a very small fraction of our user base 3. Measure the impact of the ranking change”— Sriram Sankar, facebook.com
“And people are an essential part of this process. You must be able to incorporate human knowledge and expertise into your data pipeline at almost every level; it is the right balance and combination of humans and machines that will determine a deep search system’s true capabilities and ability to ad…”— Jacob Perkins, streamhacker.com
“Deep search requires a deep understanding of your data: what it is, what it looks like, what it’s good for, and how to transform it into a format that machines can understand.”— Jacob Perkins, streamhacker.com
“An advanced search system uses a text search engine at its lowest levels, but integrates additional ranking signals. Where basic text search only knows about individual documents, and statistics about collections of documents, an advanced search system also considers external signals like trustworth…”— Jacob Perkins, streamhacker.com
“max_matches setting controls how much matches searchd will keep in RAM while searching. All matching documents will be normally processed, ranked, filtered, and sorted even if max_matches is set to 1. But only best N documents are stored in memory at any given moment for performance and RAM usage re…”— Sphinx Search, sphinxsearch.com
“The best thing about search is you always find what you want. The worst thing about search is you never find what you do not want.”— Joshua Cohen, amazon.com