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Apache Traffic Server™ is fast, scalable and extensible HTTP/1.1 compliant caching proxy server. Formerly a commercial product, Yahoo! donated it to the Apache Foundation, and it is now an Apache TLP. Here's a Traffic Server overview.

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  • Caching

    Improve your response time, while reducing server load and bandwidth needs by caching and reusing frequently-requested web pages, images, and web service calls.

  • Proxying

    Easily add keep-alive, filter or anonymize content requests, or add load balancing by adding a proxy layer.

  • Fast

    Scales well on modern SMP hardware, handling 10s of thousands of requests per second.

  • Extensible

    APIs to write your own plug-ins to do anything from modifying HTTP headers to handling ESI requests to writing your own cache algorithm.

  • Proven

    Handing over 400TB a day at Yahoo! both as forward and reverse proxies, Traffic Server is battle hardened.

  • Having trouble with builds, configurations or are you getting errors you don't understand? Subscribe to our Users Mailing List or join our #traffic-server channel on irc.freenode.net to get help!

  • Can't get your plugin to work? Get help from developers or start a discussion on our dev discussion list.

  • Report or confirum bugs or try out the latest patches patches from our Bug Tracker

  • Learn here how to ask good questions, create useful bugs reports and how to apply patches.

  • Subscribe and help out on the users Mailing List or on the #traffic-server channel on irc.freenode.net.

  • Impress developers or help others by participating on our dev discussion list or follow the latest development on our commits list.

  • Report issues or bring patches to our Bug Tracker

  • Visit our wiki to see a list of Projects we are currently working on.

  • Learn here how to create patches to the code or the documentation and how to debug traffic server..

  • December 07, 2011: The Apache Traffic Server 3.0.2 is now available on the Apache mirrors.
  • November 18, 2011: The Apache Traffic Server 3.1.1-unstable is now available on the Apache mirrors.
  • August 25, 2011: The Apache Traffic Server 3.1.0-unstable is now available on the Apache mirrors.
  • August 24, 2011: The Apache Traffic Server Project proudly welcomes William Bardwell as a new Comitter!
  • August 19, 2011: The Apache Traffic Server Project proudly welcomes Lian Zhang (mohan_zl) as a new Comitter!
  • July 19, 2011: The Apache Traffic Server 3.0.1 is now available on the Apache mirrors.
  • June 14, 2011: We are extremely pleased to announce that Traffic Server 3.0.0 is now available on the Apache mirrors.
  • June 13, 2011: The Apache Traffic Server Project proudly welcomes Zhao Yongming as a new Comitter. Contratulations!
  • May 30, 2011: Traffic Server 2.1.9-unstable is now available on the Apache mirrors.
  • May 5, 2011: Traffic Server 2.1.8-unstable is now available on the Apache mirrors.
  • March 21, 2011: Traffic Server 2.1.7-unstable is now available on the Apache mirrors.
  • March 3, 2011: Traffic Server 2.1.6-unstable is now available on the Apache mirrors.
  • January 12, 2011: Traffic Server 2.1.5-unstable is now available on the Apache mirrors.
  • November 15, 2010: Traffic Server 2.1.4-unstable is now available on the Apache mirrors.
  • October 25, 2010: Please congratulate Igor Galić for becoming a committer and PMC member. Welcome!
  • September 27, 2010: Traffic Server 2.1.3-unstable is now available on the Apache mirrors and fixes a cache corruption issue in 2.1.2.
  • September 1, 2010: We are pleased to announce that Traffic Server 2.1.2-unstable and the stable 2.0.1 are now available on the Apache mirrors. Both releases improve resilience against DNS poisoning and forging of response packets. The 2.1.2 release fixes a few bugs with 2.1.1 and cleans up several other code areas.
  • July 14, 2010: Please congratulate Theo Schlossnagle for becoming a committer and PMC member. Welcome!
  • June 7, 2010: We are pleased to announce that Traffic Server 2.1.1-unstable is now available on the Apache mirrors. This is an unstable release from the development line so all issues reported will be fixed in the trunk. That said, 2.1.1-unstable brings a completely new, flexible configuration layout, simplifying the build and packaging task for binary distributions; performance improvements on cache for larger(ish) objects; and the HTTP state machine is now 64-bit "clean", allowing for caching and proxying documents larger than 2GB.
  • May 18, 2010: We are pleased to announce that Traffic Server 2.1.0-unstable is now available on the Apache mirrors. This is an unstable release from the development line so all issues reported will be fixed in the trunk. That said, 2.1.0-unstable brings a number of features and performance improvements including support for FreeBSD, MacOSX and Solaris, improved cache seek/write efficiency, 64-bit support, and dramatically reduced miss latency.
  • May 10, 2010: Please congratulate Jason Giedymin for becoming a committer and PMC member. Welcome!
  • May 4, 2010:Apache Traffic Server 2.0.0 was released.
  • April 21, 2010: the Apache Software Foundation Board promoted Traffic Server to a top-level project (TLP).