How Google Search Works By Tushar Joshi

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Presentation for Nagpur Google Technology User Group, February 2012 Meet

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How Google Search Works By Tushar Joshi

  1. 1. Tushar JoshiSoftware Architect / JUG Leader / NetBeans Dream Team member Works@Persistent Systems
  2. 2.  The list of search results come from database The list is processed by algorithms to sort them with  Importance  PageRank  Relevance The search result is not real time, it is a cache
  3. 3.  Googol means 1 x 10100 or in other words 1 with 100 zeros Used to coin the name Google Google became a verb in dictionary, meaning searching the internet using Google Search Engine
  4. 4. Crawlers or Robots or SpiderDatabase, Cache, Page-storeInterface, Presentation
  5. 5. Internet Search Crawler Cache, Indexes
  6. 6. Keywords sent forSearch List of pages from Cache Sorting with relevance and presentation
  7. 7.  Software Engine Runs continuously Scans web pages using links to navigate Backbone of any search engine
  8. 8.  Makes special index entries for web pages ID for each page downloaded List of all the words appearing in web page Sorting web page IDs in barrels of keywords Assigning properties to web pages  Outward Links  Inward Links  Meta Tags, Headings, Structure  Calculated Page Rank
  9. 9.  Storage of web page cache Huge amount of data Stored across multiple storage hardware and computer assemblies using proprietary storage software
  10. 10.  http://www.google.com/intl/en/about/com pany/history.html http://en.wikipedia.org/wiki/History_of_Go ogle http://infolab.stanford.edu/~backrub/googl e.html http://www.youtube.com/watch?v=BNHR6IQ JGZs

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