Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Apache Traffic Server
open-in-new
<h2 id="current-version">Current version</h2> <p>The latest stable version is 10.0.5 and was released on 2 April 2025<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a>. The latest <a href="/facts/Long-term_support/0b0L8MKh">long-term support</a> version is and was released on . </p><p>As of June 2021, ATS is released in two stable versions, Version 8 is a <a href="/facts/Long-term_support/0b0L8MKh">long-term support</a> version of ATS while version 9 is the latest stable release, with quarterly minor versions scheduled. Beginning with version 4.0, all releases are considered stable for production, and follow regular <i><a href="/facts/Software_versioning/EP8VXAUU">semantic versioning</a></i>. No more developer preview releases will be made, instead, the <a href="/facts/Git_(software)/U5Ty9QmQ">Git</a> master branch is considered preview quality at all times. Long-term support is provided for the last minor version within a major release, for one added year.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> </p><p>ATS has good support for the next generation HTTP protocol as of v6.0.0, <a href="/facts/HTTP%2f2/L7V7rfeP">HTTP/2</a> (a.k.a. H2). On the <a href="https://istlsfastyet.com">Is TLS Fast Yet</a> site, it scores 100%. ATS is actively developed and supported by several <a href="https://trafficserver.apache.org/users.html">large companies</a>, as well as many individual contributors. </p> <h2 id="features-and-performance">Features and performance</h2> <p>The OStatic post describes TS as shipping <i>"... with not only an HTTP web proxy and caching solution, but also ... a server framework, with which you can build very fast servers for other protocols"</i>. Traffic Server has been benchmarked to handle 200,000 requests per second or more (small objects out of cache).<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> At a talk at the 2009 Cloud Computing Expo,<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> members of the Yahoo! TS team stated that TS is used in production at Yahoo! to handle 400TB of traffic per day using only 150 commodity machines. The OStatic post describes TS as the <i>"product of literally hundreds of developer-years"</i>. </p> <h2 id="deployment">Deployment</h2> <p>In the context of cloud computing, TS would sit conceptually at the edge of the cloud, routing requests as they come in. In Yahoo!, it is used for the edge services as shown in a graphic<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> distributed at the 2009 Cloud Computing Expo depicting Yahoo!'s private cloud architecture. In practical terms, a typical server configuration might use TS to serve static content, such as images, <a href="/facts/JavaScript/XhhIIEsl">JavaScript</a>, <a href="/facts/Cascading_Style_Sheets/tA90XBQo">Cascading Style Sheets</a> (CSS), and HyperText Markup Language (<a href="/facts/HTML/sSc3fT78">HTML</a>) files, and route requests for dynamic content to a web server such as <a href="/facts/Apache_HTTP_Server/tcmWYYUq">Apache HTTP Server</a>. </p> <h2 id="external-links">External links</h2> <ul><li><a href="https://trafficserver.apache.org">Official website</a> </li> <li><a href="https://static.usenix.org/events/lisa11/tech/slides/hedstrom.pdf">Apache Traffic Server: More Than Just a Proxy</a> - talk by Leif Hedstrom at <a href="/facts/USENIX/2wz6aQwq">USENIX</a> (<a href="https://www.youtube.com/watch?v=RNTw7jZwlKQ">Video Archive</a> on <a href="/facts/YouTube_video_(identifier)/db276jst">YouTube</a>)</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Apache Incubator Wiki August 2009 Board reports". 2009-08-12. Archived from the original on 2012-08-21. Retrieved 2009-12-24. <a href="https://web.archive.org/web/20120821055600/http://wiki.apache.org/incubator/August2009" target="_blank">https://web.archive.org/web/20120821055600/http://wiki.apache.org/incubator/August2009</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"Yahoo's Cloud Team Open Sources Traffic Server". 2009-11-02. Archived from the original on 2012-06-12. Retrieved 2009-12-24. <a href="https://web.archive.org/web/20120612201109/http://ostatic.com/blog/guest-post-yahoos-cloud-team-open-sources-traffic-server" target="_blank">https://web.archive.org/web/20120612201109/http://ostatic.com/blog/guest-post-yahoos-cloud-team-open-sources-traffic-server</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"Traffic Server graduates to top-level open-source project". 2010-04-23. Archived from the original on 2016-07-29. Retrieved 2013-09-16. <a href="https://web.archive.org/web/20160729043959/https://developer.yahoo.com/blogs/ydn/traffic-server-graduates-top-level-open-source-project-7941.html" target="_blank">https://web.archive.org/web/20160729043959/https://developer.yahoo.com/blogs/ydn/traffic-server-graduates-top-level-open-source-project-7941.html</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"Release 10.0.5". 2 April 2025. Retrieved 7 April 2025. <a href="https://github.com/apache/trafficserver/releases/tag/10.0.5" target="_blank">https://github.com/apache/trafficserver/releases/tag/10.0.5</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"Official project release management process". 2013-09-06. <a href="https://cwiki.apache.org/confluence/display/TS/Release+Management" target="_blank">https://cwiki.apache.org/confluence/display/TS/Release+Management</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>"The Apache Software Foundation Announces Apache Traffic Server v3.0.0 : The Apache Software Foundation Blog". 2011-06-14. <a href="https://blogs.apache.org/foundation/entry/the_apache_software_foundation_announces13" target="_blank">https://blogs.apache.org/foundation/entry/the_apache_software_foundation_announces13</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"2009 Cloud Computing Expo". 2009-08-12. Archived from the original on 2010-01-02. Retrieved 2020-06-19. <a href="https://web.archive.org/web/20100102042102/http://cloudcomputingexpo.com/" target="_blank">https://web.archive.org/web/20100102042102/http://cloudcomputingexpo.com/</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>"Yahoo's edge services graphic". 2011-06-14. Archived from the original on 2013-01-31. Retrieved 2011-06-14. <a href="https://web.archive.org/web/20130131223337/http://farm3.static.flickr.com/2452/4078596535_a25824be31.jpg" target="_blank">https://web.archive.org/web/20130131223337/http://farm3.static.flickr.com/2452/4078596535_a25824be31.jpg</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> </ol>