Enough Datadog

Trace

A trace tracks time spent by an application processing a request and the status of this request. Each trace consists of one or more spans.

Span

A span represents a logical unit of work in a distributed system for a given time period. Multiple spans construct a trace.

Your App -> Ingestion Sampling rules -> 15m Live Search

15m Live Search -> Retention Filter -> 15 days indexed search
15m Live Search -> Metrics from Spans

Custom Metrics
Ingested Custom Metrics