---
title: "bf reserve · RUAL Documentation"
description: "Create a new Bloom filter with a given error rate and initial capacity. The filter will auto-scale if capacity is exceeded."
canonical: https://docs.rual.nl/block-types/redis/redis_bloom_reserve
language: en
---

# bf reserve

This block is part of the [`redis`](https://docs.rual.nl/block-types/redis) group and was last modified in core [`v14.0.4`](https://docs.rual.nl/core-versions/140004).

Create a new Bloom filter with a given error rate and initial capacity. The filter will auto-scale if capacity is exceeded.

| `redis bf.reserve` |
| --- |
| `bf.reserve` |
| `bloom reserve` |
| `bloom filter reserve` |

### Core Releases