ing <a href=/v1.15/docs/tasks/observability/distributed-tracing/zipkin/>Zipkin</a>,
<a href=/v1.15/docs/tasks/observability/distributed-tracing/jaeger/>Jaeger</a>, <a href=/v1.15/docs/tasks/observability/distributed-tracing/lightstep/>Lightstep</a>, and
<a href=https://www.datadoghq.com/blog/monitor-istio-with-datadog/>Datadog</a>. Operators control the sampling rate for trace generation (that is, the rate at
which tracing data is generated per request). This allows operators to control the amount and rate 