# hammer_backend_redis v7.1.1 - Table of Contents

Redis backend for Hammer rate-limiter

## Pages

- [Hammer.Redis](readme.md)
- [Changelog](changelog.md)

## Modules

- [Hammer.Redis](Hammer.Redis.md): This backend uses the [Redix](https://hex.pm/packages/redix) library to connect to Redis.
- [Hammer.Redis.FixWindow](Hammer.Redis.FixWindow.md): This module implements the Fix Window algorithm.
- [Hammer.Redis.LeakyBucket](Hammer.Redis.LeakyBucket.md): This module implements the Leaky Bucket algorithm.
- [Hammer.Redis.SlidingWindow](Hammer.Redis.SlidingWindow.md): This module implements the Rate Limiting Sliding Window algorithm.
- [Hammer.Redis.TokenBucket](Hammer.Redis.TokenBucket.md): This module implements the Token Bucket algorithm.
The token bucket algorithm works by modeling a bucket that:
- Fills with tokens at a constant rate (the refill rate)
- Has a maximum capacity of tokens (the bucket size)
- Each request consumes one or more tokens
- If there are enough tokens, the request is allowed
- If not enough tokens, the request is denied