# Daemon Data Methods

This page lists the read and write methods on `Daemon`, which behave the same whether the process is the server or a client.

## Data Methods

| Method | Result |
|---|---|
| `Get(ctx, db, key)` | `*Record`; `ErrNotFound` when missing or expired |
| `Entries(ctx, db, pattern, *ScanOption)` | `[]Record` filtered on the server |
| `Set(ctx, db, key, content, expireAt)` | Upsert; `content` is any JSON-marshalable value |
| `SetVector(ctx, db, key, content, expireAt)` | Upsert plus background embedding; `ErrNoEmbedder` without a key |
| `Del(ctx, db, keys...)` | Number removed; zero keys returns `0` without a request |
| `TTL(ctx, db, key)` | Seconds, `-1` when persistent; `ErrNotFound` when missing |
| `Expire(ctx, db, ttl, keys...)` | Number of keys that received the TTL; zero keys returns `0` |
| `Keys(ctx, db, pattern, limit, page)` | `*ListResult` |
| `VSearch(ctx, db, text, pattern, limit)` | Keys ordered by similarity |
| `HasEmbedder(ctx)` | Whether the server store has an embedder |

`Set` stores a JSON string value as its unquoted text and any other JSON value as compacted JSON. `null` or empty content is rejected with `ErrBadRequest`. Read a record back with `Record.Value()` instead of `string(record.Content)`, which would keep the quotes and escapes of string values.

## Related Pages

- [Server-Side Filtering](/socket-daemon-filtering)
- [daemon](/api-reference-daemon)
- [Errors](/core-concepts-errors)