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# reindex

Convert an existing index's evidence representation in place, between exact and approximate.

    obikmer reindex INDEX [OPTIONS]

## Arguments

Argument | Description
--- | ---
`INDEX` | Index directory to convert (modified in place)

## Options

Option | Default | Description
--- | --- | ---
`--approx` | off | Convert to approximate evidence (default direction is approximate → exact); requires `-z`/`--evidence-bits`/`--fp`
`-z, --findere-z` | none | Findere z parameter (≥ 1)
`--evidence-bits` | none | Fingerprint bits per slot (b)
`--fp` | none | Target false-positive rate per z-window
`--block-size` | `1` | Block size for the exact on-disk index (ignored when converting to approximate)

See `index` for the exact/approximate trade-off and the underlying false-positive model, and `estimate` to explore parameters beforehand. The index directory is locked for exclusive access during conversion.