Cache (computing): Difference between revisions

Revision as of 22:30, 3 March 2025

Revision as of 14:32, 10 April 2025

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===Web cache===

{{Main|Web cache}}

Web browsers and [[web proxy server]]s, either locally or at the [[Internet service provider]] (ISP), employ web caches to store previous responses from web servers, such as [[web page]]s and [[image file format|image]]s. Web caches reduce the amount of information that needs to be transmitted across the network, as information previously stored in the cache can often be re-used. This reduces bandwidth and processing requirements of the web server, and helps to improve [[responsiveness]] for users of the web.<ref>{{cite web|url=http://docforge.com/wiki/Web_application/Caching|title=Web application caching|author=Multiple (wiki)|work=Docforge|access-date=2013-07-24|archive-date=12 December 2019|archive-url=https://web.archive.org/web/20191212152625/http://www.docforge.com/wiki/Web_application/Caching|url-status=dead}}</ref><!--[[User:Kvng/RTH]]-->

Another form of cache is [[P2P caching]], where the files most sought for by [[peer-to-peer]] applications are stored in an ISP cache to accelerate P2P transfers. Similarly, decentralised equivalents exist, which allow communities to perform the same task for P2P traffic, for example, Corelli.<ref>{{cite conference|last1=Tyson|first1=Gareth|last2=Mauthe|first2=Andreas|last3=Kaune|first3=Sebastian|last4=Mu|first4=Mu|last5=Plagemann|first5=Thomas|title=Corelli: A Dynamic Replication Service for Supporting Latency-Dependent Content in Community Networks|url=http://comp.eprints.lancs.ac.uk/2044/1/MMCN09.pdf|conference=MMCN'09|archive-url=https://web.archive.org/web/20150618193018/http://comp.eprints.lancs.ac.uk/2044/1/MMCN09.pdf|archive-date=2015-06-18}}</ref>

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===Content delivery network===

{{Main|Content delivery network}}

A content delivery network (CDN) is a network of distributed servers that deliver pages and other Web[[web content]] to a user, based on the geographic locations of the user, the origin of the web page and the content delivery server.

CDNs beganwere introduced in the late 1990s as a way to speed up the delivery of static content, such as HTML pages, images and videos. By replicating content on multiple servers around the world and delivering it to users based on their ___location, CDNs can significantly improve the speed and availability of a website or application. When a user requests a piece of content, the CDN will check to see if it has a copy of the content in its cache. If it does, the CDN will deliver the content to the user from the cache.<ref name=":0">{{cite web|url=https://people.cs.umass.edu/~ramesh/Site/PUBLICATIONS_files/DMPPSW02.pdf|title=Globally Distributed Content Delivery, by J. Dilley, B. Maggs, J. Parikh, H. Prokop, R. Sitaraman and B. Weihl, IEEE Internet Computing, Volume 6, Issue 5, November 2002.|access-date=2019-10-25|archive-url=https://web.archive.org/web/20170809231307/http://people.cs.umass.edu/~ramesh/Site/PUBLICATIONS_files/DMPPSW02.pdf|archive-date=2017-08-09|url-status=live}}</ref><!--[[User:Kvng/RTH]]-->

===Cloud storage gateway===