Traffic Server 是一套快速、模块化的兼容 HTTP/1.1 的反向代理服务器，与 Nginx 和 Squid 类似，目前该项目已经转到 Apache 基金会。
Apache Traffic Server 新的稳定产品系列4.0.1发布。2013-08-30 squid varnish之外的代理服务器选择。这是之前yahoo开发并使用的，现在并入到Apache中。国内taobao用的很多。 上一个版本是2013-07-17的3.2.5。
完全改进：
Bugs
[TS-1823] - config file line continuation support
[TS-2111] - configure check in boost falsely requires 1.50
[TS-2112] - libloader promoted to "stable" but is not built
[TS-2127] - Move hostdb.config to var/trafficserver
[TS-2128] - Don't link libGeoIP.so.1 into binaries (only into plugin itself)
[TS-2129] - Check for Perl MakeMaker module
[TS-2130] - Checks around pthread_setname_np() fails on various platforms
[TS-2131] - Calling "make install" sets ${localstatedir} owner and group to "ats" user
[TS-2132] - Calling "make install" sets ${libexecdir} owner and group to "ats" user
[TS-2154] - Lua plugin asserts traffic_server on startup
[TS-2161] - TSHttpTxnHookAdd memory Leak
Improvement
[TS-1597] - document remap.config filtering directives
升级指南 https://cwiki.apache.org/confluence/display/TS/Upgrading+to+v4.0
下载：http://apache.org/dist/trafficserver/trafficserver-4.0.1.tar.bz2
来自:开源中国社区
