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DevOps & Automation · Foundational

Structured Logging

Writing log events as machine-parseable key-value data, typically JSON, rather than free-form text.

Definition

Structured logs make filtering, aggregation, and correlation reliable because fields such as level, service, trace_id, and user action are explicit. They work well with log platforms that index fields.

Example

{"level":"error","service":"cart","trace_id":"4bf9...","msg":"payment timeout"}

Exam tip

Including trace IDs in structured logs is the standard way to correlate logs with traces.

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