"Despite having published details on technologies like the Google File System, Google has not released the software as open source and shows little interest in selling it. The only way it is available to another enterprise is in embedded form--if you buy a high-end version of the Google Search Appliance, one that is delivered as a rack of servers, you get Google's technology for managing that cluster as part of the package." "How Google Works"[失效連結]
highscalability.com
Google's Colossus Makes Search Real-Time by Dumping MapReduce, High Scalability (World Wide Web log), 2010-09-11 [2014-09-24], （原始内容存档于2020-11-09）.
