---
title: "Grafana Mimir key-value store | Grafana Mimir documentation"
description: "The key-value store is a database that stores data indexed by key."
---

# Grafana Mimir key-value store

A key-value (KV) store is a database that stores data indexed by key. Grafana Mimir requires a key-value store for the following features:

- [Hash ring](../hash-ring/)
- [(Optional) Distributor high-availability tracker](../../../configure/configure-high-availability-deduplication/)

## Supported key-value store backends

Grafana Mimir supports the following key-value (KV) store backends:

- Gossip-based [memberlist](https://github.com/hashicorp/memberlist) protocol (default)
- [Consul](https://www.consul.io)
- [Etcd](https://etcd.io)

### Gossip-based memberlist protocol (default)

By default, Grafana Mimir instances use a Gossip-based protocol to join a memberlist cluster. The data is shared between the instances using peer-to-peer communication and no external dependency is required.

We recommend that you use memberlist to run Grafana Mimir.

To configure memberlist, refer to [configuring hash rings](../../../configure/configure-hash-rings/).

> Note
> 
> The Gossip-based memberlist protocol isn’t supported for the [optional distributor high-availability tracker](../../../configure/configure-high-availability-deduplication/).

### Consul

Grafana Mimir supports [Consul](https://www.consul.io) as a backend KV store. If you want to use Consul, you must install it. The Grafana Mimir installation does not include Consul.

To configure Consul, refer to [configuring hash rings](../../../configure/configure-hash-rings/).

### Etcd

Grafana Mimir supports [etcd](https://etcd.io) as a backend KV store. If you want to use etcd, you must install it. The Grafana Mimir installation does not include etcd.

To configure etcd, refer to [configuring hash rings](../../../configure/configure-hash-rings/).