Correlation ID & Request ID Generator
Generate unique tracking identifiers to trace transactions across distributed microservices, API gateways, and system logs.
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Distributed Tracing Best Practices
Standard HTTP Headers
Common header names include `X-Correlation-ID`, `X-Request-ID`, `Traceparent`, and `X-Trace-Id` across API gateways and service meshes.
Propagation Through Layers
Ensure downstream outbound HTTP client requests, message queue payloads, and database logs explicitly inherit incoming correlation context.
Time-Ordered IDs (UUID v7 / ULID)
Prefer time-sortable identifiers for database index efficiency and chronological log sorting in distributed aggregation engines.
Frequently Asked Questions (FAQ)
A Request ID typically identifies a single inbound HTTP request/response cycle, whereas a Correlation ID spans multiple downstream service calls, asynchronous jobs, or microservice interactions belonging to the same root business transaction.
While `X-Request-ID` is widely adopted across web servers like Nginx and Heroku, modern cloud-native systems increasingly follow the W3C Trace Context specification (`traceparent` and `tracestate`) for interoperable telemetry.