Company
Date Published
Author
Ben Vinegar
Word count
1995
Language
English
Hacker News points
None

Summary

Distributed tracing is a method of recording connected operations across multiple services, allowing developers to pinpoint errors or performance bottlenecks in individual services that negatively affect the overall system. A distributed trace consists of spans (describing an operation) and traces (the end-to-end journey of connected spans). Traces are uniquely identified with a trace identifier, and each span within a trace has a unique span identifier. The tracing metadata is propagated through services via a trace context, which includes the trace identifier and parent identifier. This allows developers to reconstruct the sequence of events occurring in their distributed services. While this concept may seem contrived in examples, it becomes essential in real-world distributed tracing environments where proper tracing libraries handle instrumentation and emitting of tracing data. Tools like OpenTelemetry and Sentry provide language-specific implementations for instrumenting, generating, and exporting telemetry data from running software, and use tracing metadata to augment error monitoring capabilities.