Open-source proxy server
The
Apache
Traffic Server
(
ATS
) is a modular, high-performance
reverse proxy
and
forward proxy
server, generally comparable to
Nginx
and
Squid
. It was created by
Inktomi
, and distributed as a commercial product called the Inktomi Traffic Server, before Inktomi was acquired by
Yahoo!
.
Shortly after Yahoo! released the TS source to Apache as an Apache Incubator project in July 2009,
[3]
a guest editor on Yahoo!'s online publication
OStatic
[4]
stated that Yahoo! uses TS in production to serve more than 30 billion objects per day on sites like the Yahoo! homepage, and Yahoo! Sports, Mail and Finance.
On April 21, 2010, the Apache board accepted Traffic Server as a TLP, graduating the project out of incubation.
[5]
Current version
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]
The latest stable version is 9.2.2 and was released on August 3, 2023. The latest
long-term support
version is 8.1.8 and was released on August 3, 2023.
[6]
As of June 2021
[update]
, ATS is released in two stable versions, Version 8 is a
long-term support
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
semantic versioning
. No more developer preview releases will be made, instead, the
Git
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.
[7]
ATS has good support for the next generation HTTP protocol as of v6.0.0,
HTTP/2
(a.k.a. H2). On the
Is TLS Fast Yet
site, it scores 100%. ATS is actively developed and supported by several
large companies
, as well as many individual contributors.
Features and performance
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]
The OStatic post describes TS as shipping
"... 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"
. Traffic Server has been benchmarked to handle 200,000 requests per second or more (small objects out of cache).
[8]
At a talk at the 2009 Cloud Computing Expo,
[9]
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
"product of literally hundreds of developer-years"
.
Deployment
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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
[10]
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,
JavaScript
,
Cascading Style Sheets
(CSS), and HyperText Markup Language (
HTML
) files, and route requests for dynamic content to a web server such as
Apache HTTP Server
.
References
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]
External links
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Top-level
projects
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Commons
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Incubator
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Other projects
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Attic
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Licenses
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