Unverified50% confidenceFactExact time
The concepts of Trace and Span originate from distributed tracing systems (such as Jaeger and Zipkin): a complete request chain is modeled as a Trace, and each operation unit in the chain is a Span, with Spans forming a directed acyclic graph through parent-child relationships.
1
Sources
50%
Confidence
Long-term
Relevance
10/31/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedA trace represents the complete lifecycle of a request or transaction and consists of several spans; each span records an operation with a start and end time and carries a name, attributes, events, and status; spans form a directed acyclic graph through parent-child relationships.74% similarUnverifiedThe trace structure displayed in Phoenix is essentially a tree of Spans, where each Span represents a discrete operation and records the start time, end time, input parameters, and return values.66% similarUnverifiedThe essence of tracing the dependency chain is to visualize the ordering constraints between operators in order to identify the critical path that determines overall latency.65% similarUnverifiedTrace capture (traces) is borrowed from observability monitoring practices in distributed systems and is used to reconstruct the complete execution path of each AI request.65% similarUnverifiedIn agent scenarios, observability usually consists of three parts: traces, metrics, and logs; a trace records the tree-structured call relationships of all steps within a single request, with each node containing input, output, state, and elapsed time.63% similar
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