{topsy_retweet_button} Read Four Demons of Search: Part 1, where we discuss the first two of Four Demons of Search that search engines must constantly battle: query speed, relevance (ranking results), frequency of index updates and recall (indexing historical data). Update Frequency The ideal index update frequency is “never”, especially if any relevance ranking is being [...]

{topsy_retweet_button} In a previous blog post, we introduced the Four Demons of Search that search engines must constantly battle: query speed, relevance (ranking results), frequency of index updates and recall (indexing historical data). As we noted, traditional web search engines compromise on update frequency; real-time search engines typically compromise on recall and relevance. In this [...]