> This page is for NeMo Relay, version Latest (v0.10.0) (default).
> For other versions, use one of these documentation indexes:
> - Latest (v0.10.0) (default): https://docs.nvidia.com/nemo/relay/latest/llms.txt
> - dev: https://docs.nvidia.com/nemo/relay/dev/llms.txt
> - v0.10.0: https://docs.nvidia.com/nemo/relay/v0.10.0/llms.txt
> - v0.9.4: https://docs.nvidia.com/nemo/relay/v0.9.4/llms.txt
> - v0.8.4: https://docs.nvidia.com/nemo/relay/v0.8.4/llms.txt
> - v0.7.3: https://docs.nvidia.com/nemo/relay/v0.7.3/llms.txt
> - v0.6.0: https://docs.nvidia.com/nemo/relay/v0.6.0/llms.txt
> - v0.5.0: https://docs.nvidia.com/nemo/relay/v0.5.0/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# Module otel_file

> OTLP file export for NeMo Relay Core.

Generated from `cargo doc --no-deps -p nemo-relay -p nemo-relay-adaptive -p nemo-relay-pii-redaction -p nemo-relay-ffi -p nemo-relay-types -p nemo-relay-plugin -p nemo-relay-worker-proto -p nemo-relay-worker`.

OTLP file export for NeMo Relay Core.

[`OtlpFileSpanExporter`](/reference/api/rust-library-reference/nemo-relay/observability/otel_file/struct-otlpfilespanexporter) writes the same `ExportTraceServiceRequest` the network exporters put on the wire to a local file. [`OtlpFileFormat`](/reference/api/rust-library-reference/nemo-relay/observability/otel_file/enum-otlpfileformat) selects between the OpenTelemetry file-exporter specification's JSON lines and the Collector's length-delimited protobuf.

## Structs

* [OtlpFileSpanExporter](/reference/api/rust-library-reference/nemo-relay/observability/otel_file/struct-otlpfilespanexporter): Writes exported spans to a local file as OTLP.

## Enums

* [OtlpFileExporterError](/reference/api/rust-library-reference/nemo-relay/observability/otel_file/enum-otlpfileexportererror): Errors produced while configuring or operating the OTLP file exporter.
* [OtlpFileFormat](/reference/api/rust-library-reference/nemo-relay/observability/otel_file/enum-otlpfileformat): On-disk encoding used by [`OtlpFileSpanExporter`](/reference/api/rust-library-reference/nemo-relay/observability/otel_file/struct-otlpfilespanexporter).

## Type Aliases

* [Result](/reference/api/rust-library-reference/nemo-relay/observability/otel_file/type-result): Result type for the OTLP file exporter.