Multiple ChoiceHard 45s
Tail-based sampling
Why do teams use tail-based sampling for traces rather than head-based sampling?
Options
- 1It decides retention after seeing the full trace, so it keeps all slow/errored traces that matter and drops boring fast ones
- 2It produces fewer traces overall because the sampling decision happens before spans are generated
- 3It reduces span cardinality in metrics by collapsing all the spans into aggregate time series
- 4It eliminates the need for a collector because each service exports its own already-sampled spans
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