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 4.0.2发布。2013-10-14 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。taobao用的很多。 上一个版本是2013-08-30的4.2.1遗留产品线3.2.5/3.0.5
Apache Traffic Server 4.0.2 was released on October 14, 2013.
This is our next generation major relase, fixing serious bugs found in the v4.0.1 release. Upgrading from v3.2 to v4.0 implies reinitializing the cache, so existing cache data will be erased. This should happen automatically on startup, but please be careful. For details on upgrading to v4.0.2, see these instructions.
The following bugs were fixed since the latest developement release (v4.0.1, see below):
- [TS-2144] - traffic_server crashes when clearing cache
- [TS-2173] - cache total hit/miss stats broken in version 4.0.1
- [TS-2174] - traffic_shell/traffic_line miss some stats value
- [TS-2191] - when http_info enabled, the http_sm may be deleted but a event associated it not cancelled.
- [TS-2207] - Centos5 out of tree perl build fails
- [TS-2217] - remove the option to turn off body factory - setting it to 0 will result in empty responses