X-Trace is a network diagnostic tool designed to provide users and network operators with better visibility into increasingly complex Internet applications. It does this by annotating network requests with metadata that can be used to reconstruct requests, even those that make use of multiple network layers. X-Trace “enabled” Internet sites make use of these identifiers to record the path that requests take through their network.

Although X-Trace is still under development, some preliminary information and code is available here for testing and evaluation purposes.

• Current Version - 2.0 http://sourceforge.net/projects/xtraceprj/
• Legacy Version - 1.3 https://gforge.x-trace.net/gf/project/xtrace/

The X-Trace enabled Hadoop Map/Reduce system is going to be available shortly at this location. If you are interested in getting early access to it, please let us know at andyk@cs.berkeley.edu

• Coral CDN new!
• Hadoop
• Oasis Anycast Service
• Thrift

• Java API reference (javadoc) new! version 2.0
• C++ API Reference new! version 2.0
• X-Trace Metadata Specification [txt]
• Tutorial 1 - X-Trace Getting Started new!
• X-Trace backend server configuration guide
• Installation and Usage manual (this is from the previous release)
• Specifications for report keys and values

• Using X-Trace in your code
• Filtering reports with severity

• Mailing list
• Feature requests, bug listing, "to-do" list
• Discussion

X-Trace: A Pervasive Network Tracing Framework (html) NSDI'07