# Embedding Cache

This page describes the key and value format of the cache that lets ToriiDB reuse an embedding for identical text.

## Cache Format

```text
__torii:embed:<hex(sha256("<model>|<dim>|<text>"))>
```

The cache value is JSON `{"v": <base64 vector>, "d": <dim>, "m": <model>}`, has no TTL, and is persisted like any entry. An entry is reused only when its stored dimension matches. Vectors are base64-encoded little-endian `float32` in both cache entries and log records.

## Related Pages

- [Attaching Vectors](/vector-search)
- [Core Concepts](/core-concepts)
- [Files and Writes](/persistence)