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OllamaEmbeddingEngine

cognee_lib::embedding

Struct OllamaEmbeddingEngine 

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pub struct OllamaEmbeddingEngine { /* private fields */ }
Expand description

Embedding engine that calls the Ollama /api/embed HTTP endpoint.

Sends one request per input text concurrently using futures::future::join_all. Transient HTTP errors (network failures, 429, 5xx) are retried with exponential back-off starting at 8 s (doubling to 128 s) for up to 128 s total.

§Response shapes

Ollama can return embeddings in three shapes depending on the version and endpoint:

  • {"embeddings": [[...]]} — standard /api/embed response
  • {"embedding": [...]} — legacy single-embedding response
  • {"data": [{"embedding": [...]}]} — OpenAI-compatible shape

All three shapes are handled transparently.

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impl OllamaEmbeddingEngine

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pub fn new( config: &EmbeddingConfig, ) -> Result<OllamaEmbeddingEngine, EmbeddingError>

Construct a new engine from the given EmbeddingConfig.

Returns EmbeddingError::ConfigError if the reqwest client cannot be built (e.g. invalid TLS or API key header value).

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impl EmbeddingEngine for OllamaEmbeddingEngine

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fn embed<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, texts: &'life1 [&'life2 str], ) -> Pin<Box<dyn Future<Output = Result<Vec<Vec<f32>>, EmbeddingError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, OllamaEmbeddingEngine: 'async_trait,

Embed a batch of text strings into normalized vectors Read more
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fn dimension(&self) -> usize

Get the dimensionality of embeddings produced by this engine Read more
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fn batch_size(&self) -> usize

Get the optimal batch size for this engine Read more
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fn max_sequence_length(&self) -> usize

Get the maximum sequence length (in tokens) supported Read more

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