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Welcome to the developers version of X-Trace 2.0. You most likely have checked this out of SVN since this is not the distribution package of X-Trace. X-Trace is a framework for tracing the execution of distributed systems. It provides a logging-like API for the programmer, allowing the recording of events during the execution. The distinguishing feature of X-Trace is that it records the causal relations among these events in a deterministic fashion, across threads, software layers, different machines, and potentially different network layers and administrative domains. X-Trace groups events in tasks, which are sets of causally related events with a definite start. Events in a task for a directed acyclic graph (DAG) which you can visualize and run analysis on. X-Trace libraries have been implemented in a variety of languages. The primary X-Trace collection backend framework is implemented in java. See src/java/README.txt and src/java/INSTALL.txt for more information regarding the Java based X-Trace framework and instrumentation libraries.