# Apache Traffic Server

> proxy server developed by the Apache Software Foundation

**Wikidata**: [Q1061377](https://www.wikidata.org/wiki/Q1061377)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Apache_Traffic_Server)  
**Source**: https://4ort.xyz/entity/apache-traffic-server

## Summary

Apache Traffic Server is a software application established in 1998 [1]. It functions as a high-performance HTTP proxy and caching server designed to handle large volumes of web traffic efficiently. The software is maintained by the Apache Software Foundation and is used by organizations requiring scalable and reliable content delivery infrastructure. [1]

## Summary
Apache Traffic Server is a high-performance, extensible web cache and proxy server developed by the Apache Software Foundation. Originally proprietary software developed by Inktomi and later Yahoo Inc., it became free software under the Apache License in 2009. It is designed to handle HTTP traffic and operates on Unix-like systems, serving as a mechanism for the temporary storage and caching of web documents.

## Key Facts
- **Entity Type:** Proxy server, web cache, application, free software.
- **Developer:** Currently maintained by the Apache Software Foundation (since August 2009). Previously developed by Yahoo Inc. (2002–2009) and Inktomi (1998–2002).
- **Inception:** The project was originally established in 1998.
- **License:** Apache Software License 2.0 (since August 2009); previously proprietary (1998–2009).
- **Operating Systems:** Runs on Linux, macOS, FreeBSD, and illumos (Unix-like operating systems).
- **Function:** Used for web caching and HTTP proxying.
- **Latest Stable Version:** 10.0.1 (released October 29, 2024).
- **Source Repository:** https://github.com/apache/trafficserver
- **Official Website:** https://trafficserver.apache.org

## FAQs

### Q: What is Apache Traffic Server used for?
A: Apache Traffic Server is used as a web cache and proxy server to handle HTTP traffic. It temporarily stores web documents to reduce server load and improve content delivery speeds.

### Q: Who owns and develops Apache Traffic Server?
A: The software is currently developed by the Apache Software Foundation. It was originally created by Inktomi in 1998 and subsequently owned and developed by Yahoo Inc. before being donated to the Apache Foundation in 2009.

### Q: On which operating systems can Apache Traffic Server run?
A: It is supported on Unix-like operating systems, specifically Linux, macOS, FreeBSD, and illumos.

### Q: Is Apache Traffic Server free to use?
A: Yes, it is free software distributed under the Apache Software License 2.0, allowing users to freely run, study, change, and distribute it.

## Why It Matters
Apache Traffic Server is a significant entity in the infrastructure of the modern web, representing a robust bridge between proprietary enterprise origins and the open-source ecosystem. Originally developed by Inktomi in 1998 and later managed by Yahoo Inc., the software served as a high-performance solution for managing large-scale web traffic and caching. Its transition to the Apache Software Foundation in 2009 transformed it into a community-driven project, making its powerful caching mechanisms freely available to the public under the Apache License.

Its relevance lies in its ability to handle high volumes of HTTP connections efficiently, acting as a critical component for content delivery networks and large-scale web services. By supporting operating systems like Linux and FreeBSD, it provides a versatile tool for system administrators to optimize network performance, reduce latency, and manage bandwidth usage effectively.

## Notable For
- **Transition to Open Source:** Distinct for its shift from a proprietary license (starting in 1998) to an open-source model in August 2009, releasing years of enterprise-grade engineering to the public.
- **Enterprise Pedigree:** Built upon the caching technologies developed by Inktomi and Yahoo Inc., two major players in early internet search and infrastructure.
- **Extensibility:** Classified as an application and free software that supports complex HTTP proxying and caching configurations.
- **Active Development:** Maintains a rapid release cadence with recent stable versions (e.g., v10.0.1) released as of late 2024, indicating active community support and modernization.
- **Cross-Platform Unix Support:** Uniquely supports a specific range of Unix-like environments including illumos and FreeBSD, alongside standard Linux distributions.

## Body

### Development History
Apache Traffic Server was originally conceived and launched in **1998** by **Inktomi**. During its early years, it was distributed under a **proprietary license**. In **2002**, development stewardship passed to **Yahoo Inc.**, which utilized the technology for its large-scale web operations.

A pivotal moment occurred in **August 2009**, when the software was donated to the **Apache Software Foundation**. At this point, the licensing model changed to the **Apache Software License 2.0**, and it was reclassified as free software. Key figures in its history include Leif Hedstrom, listed as a programmer for the project.

### Technical Specifications
Apache Traffic Server functions as a **proxy server** and **web cache**. Its primary use cases involve the management of **HTTP** traffic and the temporary storage (caching) of web documents to expedite retrieval and reduce origin server load.

The software is written in C++ (referenced as Q2407 in source data) and is designed to run on **Unix-like operating systems**. Specific supported environments include:
*   **Linux**
*   **macOS**
*   **FreeBSD**
*   **illumos**

### Version Timeline
The project has maintained an active release schedule, with recent updates demonstrating ongoing maintenance:
*   **v8.0.6:** Stable release (August 20, 2019)
*   **v9.1.1:** Stable release (November 2, 2021)
*   **v9.2.4:** Stable release (July 10, 2024)
*   **v8.1.11:** Legacy version release (July 25, 2024)
*   **v10.0.0:** Stable release (August 27, 2024)
*   **v10.0.1:** Stable release (October 29, 2024)

### Distribution and Access
The software is accessible via its official website (**https://trafficserver.apache.org**) and its source code repository (**https://github.com/apache/trafficserver**). It is also available through various package managers, identified as `trafficserver` in Homebrew, AUR, and Repology, and `www/trafficserver` in FreeBSD ports and NetBSD packages.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "SoftwareApplication",
  "name": "Apache Traffic Server",
  "description": "A high-performance web cache and proxy server developed by the Apache Software Foundation.",
  "url": "https://trafficserver.apache.org",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q240715",
    "https://en.wikipedia.org/wiki/Apache_Traffic_Server"
  ],
  "applicationCategory": "NetworkingApplication",
  "operatingSystem": "Linux, macOS, FreeBSD, illumos",
  "offers": {
    "@type": "Offer",
    "price": "0",
    "priceCurrency": "USD"
  },
  "author": {
    "@type": "Organization",
    "name": "Apache Software Foundation"
  }
}

## References

1. [Source](https://cwiki.apache.org/confluence/display/TS/Apache+Traffic+Server)
2. [Source](https://www.nytimes.com/2000/04/17/business/technology-2-companies-take-separate-paths-to-speed-delivery-of-web-pages.html)
3. [The trafficserver Open Source Project on Open Hub: Languages Page. Open Hub](https://www.openhub.net/p/trafficserver/analyses/latest/languages_summary)
4. [Source](https://projects.apache.org/json/projects/trafficserver-traffic_server.json)
5. [Supported Operating Systems - Traffic Server - Apache Software Foundation](https://cwiki.apache.org/confluence/display/TS/Supported+Operating+Systems)
6. [Source](https://trafficserver.apache.org/downloads)
7. [Apache Traffic Server Downloads](https://trafficserver.apache.org/downloads)
8. [2021](https://git-wip-us.apache.org/repos/asf?p=trafficserver.git;a=tag;h=b714442e8b2f0cf94024a026f97ded9a8e1c7085)
9. [Release 9.2.3. 2023](https://github.com/apache/trafficserver/releases/tag/9.2.3)
10. [Release 9.2.2. 2023](https://github.com/apache/trafficserver/releases/tag/9.2.2)
11. [Release 9.2.4. 2024](https://github.com/apache/trafficserver/releases/tag/9.2.4)
12. [Release 8.1.11. 2024](https://github.com/apache/trafficserver/releases/tag/8.1.11)
13. [Release 10.0.0. 2024](https://github.com/apache/trafficserver/releases/tag/10.0.0)
14. [Release 10.0.1. 2024](https://github.com/apache/trafficserver/releases/tag/10.0.1)
15. [Release 10.0.2. 2024](https://github.com/apache/trafficserver/releases/tag/10.0.2)
16. [Release 9.2.6. 2024](https://github.com/apache/trafficserver/releases/tag/9.2.6)
17. [Release 9.2.7. 2024](https://github.com/apache/trafficserver/releases/tag/9.2.7)
18. [Release 10.0.3. 2025](https://github.com/apache/trafficserver/releases/tag/10.0.3)
19. [Release 9.2.8. 2025](https://github.com/apache/trafficserver/releases/tag/9.2.8)
20. [Release 9.2.9. 2025](https://github.com/apache/trafficserver/releases/tag/9.2.9)
21. [Release 10.0.4. 2025](https://github.com/apache/trafficserver/releases/tag/10.0.4)
22. [Release 3.0.4. 2012](https://github.com/apache/trafficserver/releases/tag/3.0.4)
23. [Release 3.0.5. 2012](https://github.com/apache/trafficserver/releases/tag/3.0.5)
24. [Release 3.1.0. 2011](https://github.com/apache/trafficserver/releases/tag/3.1.0)
25. [Release 3.1.1. 2011](https://github.com/apache/trafficserver/releases/tag/3.1.1)
26. [Release 3.1.2. 2012](https://github.com/apache/trafficserver/releases/tag/3.1.2)
27. [Release 3.1.3. 2012](https://github.com/apache/trafficserver/releases/tag/3.1.3)
28. [Release 3.1.4. 2012](https://github.com/apache/trafficserver/releases/tag/3.1.4)
29. [Release 3.2.0. 2012](https://github.com/apache/trafficserver/releases/tag/3.2.0)
30. [Release 3.2.1. 2012](https://github.com/apache/trafficserver/releases/tag/3.2.1)
31. [Release 3.2.2. 2012](https://github.com/apache/trafficserver/releases/tag/3.2.2)
32. [Release 3.2.4. 2013](https://github.com/apache/trafficserver/releases/tag/3.2.4)
33. [Release 3.2.5. 2013](https://github.com/apache/trafficserver/releases/tag/3.2.5)
34. [Release 3.3.0. 2012](https://github.com/apache/trafficserver/releases/tag/3.3.0)
35. [Release 3.3.1. 2013](https://github.com/apache/trafficserver/releases/tag/3.3.1)
36. [Release 3.3.2. 2013](https://github.com/apache/trafficserver/releases/tag/3.3.2)
37. [Release 3.3.3. 2013](https://github.com/apache/trafficserver/releases/tag/3.3.3)
38. [Release 3.3.4. 2013](https://github.com/apache/trafficserver/releases/tag/3.3.4)
39. [Release 3.3.5. 2013](https://github.com/apache/trafficserver/releases/tag/3.3.5)
40. [Release 4.0.0. 2013](https://github.com/apache/trafficserver/releases/tag/4.0.0)
41. [Release 4.0.1. 2013](https://github.com/apache/trafficserver/releases/tag/4.0.1)
42. [Release 4.0.2. 2013](https://github.com/apache/trafficserver/releases/tag/4.0.2)
43. [Release 4.1.0. 2013](https://github.com/apache/trafficserver/releases/tag/4.1.0)
44. [Release 4.1.1. 2013](https://github.com/apache/trafficserver/releases/tag/4.1.1)
45. [Release 4.1.2. 2014](https://github.com/apache/trafficserver/releases/tag/4.1.2)
46. [Release 4.2.0. 2014](https://github.com/apache/trafficserver/releases/tag/4.2.0)
47. [Release 4.2.1. 2014](https://github.com/apache/trafficserver/releases/tag/4.2.1)
48. [Release 4.2.1.1. 2014](https://github.com/apache/trafficserver/releases/tag/4.2.1.1)
49. [Release 4.2.2. 2014](https://github.com/apache/trafficserver/releases/tag/4.2.2)
50. [Release 4.2.3. 2015](https://github.com/apache/trafficserver/releases/tag/4.2.3)