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Cecile Tonglet
22 lines
1.1 KiB
Markdown
22 lines
1.1 KiB
Markdown
# sc-telemetry
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Substrate's client telemetry is a part of substrate that allows logging telemetry information
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with a [Polkadot telemetry](https://github.com/paritytech/substrate-telemetry).
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It works using Tokio's [tracing](https://github.com/tokio-rs/tracing/). The telemetry
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information uses tracing's logging to report the telemetry which is then retrieved by a
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tracing's `Layer`. This layer will then send the data through an asynchronous channel and to a
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background task called [`TelemetryWorker`] which will send the information to the telemetry
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server.
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If multiple substrate nodes are running, it uses a tracing's `Span` to identify which substrate
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node is reporting the telemetry. Every task spawned using sc-service's `TaskManager`
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automatically inherit this span.
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Substrate's nodes initialize/register to the [`TelemetryWorker`] using a [`TelemetryHandle`].
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This handle can be cloned and passed around. It uses an asynchronous channel to communicate with
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the running [`TelemetryWorker`] dedicated to registration. Registering a telemetry can happen at
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any point in time during the execution.
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License: GPL-3.0-or-later WITH Classpath-exception-2.0
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