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→技术
=== 技术 ===
=== 技术 ===
* [[eBay.com]] uses two [[data warehouse]]s at 7.5 [[petabytes]] and 40PB as well as a 40PB [[Hadoop]] cluster for search, consumer recommendations, and merchandising.<ref>{{cite web | last=Tay | first=Liz |url=http://www.itnews.com.au/news/inside-ebay8217s-90pb-data-warehouse-342615 | title=Inside eBay's 90PB data warehouse | publisher=ITNews | access-date=12 February 2016}}</ref>
*易趣网使用两个7.5 PB和40PB的数据仓库，以及一个40PB的Hadoop集群来进行搜索、消费者推荐和商品销售。<ref>{{cite web | last=Tay | first=Liz |url=http://www.itnews.com.au/news/inside-ebay8217s-90pb-data-warehouse-342615 | title=Inside eBay's 90PB data warehouse | publisher=ITNews | access-date=12 February 2016}}</ref>
*亚马逊每天处理数以百万计的后端操作，以及来自50多万第三方卖家的查询。保持亚马逊运行的核心技术是基于Linux的，他们拥有世界上三大Linux数据库，容量分别为7.8 TB、18.5 TB和24.7 TB。<ref>{{cite web|last=Layton |first=Julia |url= http://money.howstuffworks.com/amazon1.htm | title=Amazon Technology |date=25 January 2006 |publisher= Money.howstuffworks.com |access-date=5 March 2013}}</ref>
*Facebook从其用户群中处理500亿张照片，<ref>{{cite web| url=https://www.facebook.com/notes/facebook-engineering/scaling-facebook-to-500-million-users-and-beyond/409881258919 |title=Scaling Facebook to 500 Million Users and Beyond |publisher =Facebook.com |access-date=21 July 2013}}</ref>Facebook每月有20亿活跃用户。<ref>{{Cite news|url=https://techcrunch.com/2017/06/27/facebook-2-billion-users/| title=Facebook now has 2 billion monthly users… and responsibility| last=Constine| first=Josh |date=27 June 2017|work=TechCrunch|access-date=3 September 2018}}</ref>
*谷歌每月处理大约1000亿次搜索。<ref>{{cite web|url=http://searchengineland.com/google-1-trillion-searches-per-year-212940|title=Google Still Doing at Least 1 Trillion Searches Per Year|date=16 January 2015|work=Search Engine Land|access-date=15 April 2015}}</ref>
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===COVID-19===
===COVID-19===