> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/v0.10.0/reference/api/rust-library-reference/nemo-relay/observability/otel_file/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.

> OTLP file export for NeMo Relay Core.

## Docs

- [Struct Otlp File Span Exporter](https://docs.nvidia.com/nemo/relay/v0.10.0/reference/api/rust-library-reference/nemo-relay/observability/otel_file/struct-otlpfilespanexporter.md): Writes exported spans to a local file as OTLP.
- [Enum Otlp File Exporter Error](https://docs.nvidia.com/nemo/relay/v0.10.0/reference/api/rust-library-reference/nemo-relay/observability/otel_file/enum-otlpfileexportererror.md): Errors produced while configuring or operating the OTLP file exporter.
- [Enum Otlp File Format](https://docs.nvidia.com/nemo/relay/v0.10.0/reference/api/rust-library-reference/nemo-relay/observability/otel_file/enum-otlpfileformat.md): On-disk encoding used by `OtlpFileSpanExporter`.
- [Type Alias Result](https://docs.nvidia.com/nemo/relay/v0.10.0/reference/api/rust-library-reference/nemo-relay/observability/otel_file/type-result.md): Result type for the OTLP file exporter.