# KeyDB: A Multithreaded, High-Performance Fork of Redis

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KeyDB is a high-performance, multithreaded fork of Redis, designed for enhanced memory efficiency and high throughput. It maintains full compatibility with the Redis protocol, modules, and scripts, making it a seamless drop-in replacement. KeyDB also introduces advanced features like Active Replication and a MVCC architecture for non-blocking operations.

GitHub: https://github.com/Snapchat/KeyDB
OSRepos URL: https://osrepos.com/repo/snapchat-keydb

## Summary

KeyDB is a high-performance, multithreaded fork of Redis, designed for enhanced memory efficiency and high throughput. It maintains full compatibility with the Redis protocol, modules, and scripts, making it a seamless drop-in replacement. KeyDB also introduces advanced features like Active Replication and a MVCC architecture for non-blocking operations.

## Topics

- C++
- Redis
- Database
- Caching
- Multithreading
- High Performance
- Key-Value Store
- Snap Inc.

## Repository Information

Last analyzed by OSRepos: Mon Jan 12 2026 08:01:18 GMT+0000 (Western European Standard Time)
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## Content

## Introduction
KeyDB is a high-performance, multithreaded fork of Redis, developed with a strong focus on memory efficiency and high throughput. It maintains full compatibility with the Redis protocol, modules, and scripts, making it a drop-in replacement for existing Redis deployments. KeyDB offers advanced features such as Active Replication, FLASH Storage, and Subkey Expires, alongside a MVCC architecture that allows non-blocking queries like KEYS and SCAN. Recently, KeyDB became part of Snap Inc., further solidifying its development and open-source commitment.

## Installation
KeyDB is primarily designed and tested for Linux environments, leveraging features like `SO_REUSEPORT`. To get started, first initialize and update submodule dependencies:

bash
git submodule init && git submodule update


Next, install the necessary build dependencies. For Debian/Ubuntu systems, this typically involves:

bash
sudo apt install build-essential nasm autotools-dev autoconf libjemalloc-dev tcl tcl-dev uuid-dev libcurl4-openssl-dev libbz2-dev libzstd-dev liblz4-dev libsnappy-dev libssl-dev


After dependencies are installed, compile KeyDB with a simple `make` command:

bash
make


For specific configurations, such as systemd support, TLS, or FLASH storage, additional `make` flags are available. If you encounter build issues or need to rebuild with different options, `make distclean` is recommended to clear cached build options and dependencies.

## Examples
Running KeyDB is straightforward. Navigate to the `src` directory and execute `keydb-server`:

bash
cd src
./keydb-server


You can also specify a configuration file or pass command-line options:

bash
./keydb-server /path/to/keydb.conf --port 9999


To interact with your KeyDB instance, use `keydb-cli`:

bash
cd src
./keydb-cli
keydb> ping
PONG
keydb> set foo bar
OK
keydb> get foo
"bar"
keydb> incr mycounter
(integer) 1


A comprehensive list of commands is available in the [KeyDB documentation](https://docs.keydb.dev/docs/commands/ "KeyDB Commands Documentation" target="_blank").

## Why use
KeyDB distinguishes itself by offering significantly higher throughput than Redis on the same hardware, leading to reduced operational costs and complexity. Its multithreaded architecture efficiently utilizes modern multi-core processors, while maintaining Redis protocol compatibility. Features like Active Replication simplify hot-spare failover and enable distributed writes across replicas. KeyDB's MVCC design ensures that operations like `KEYS` and `SCAN` do not block the database, preserving performance. The project's philosophy emphasizes a "batteries included" approach, aiming to provide a more complete and user-friendly experience by integrating features that might otherwise require external components. Backed by Snap Inc., KeyDB is actively maintained and committed to the open-source community.

## Links
*   [KeyDB GitHub Repository](https://github.com/Snapchat/KeyDB "KeyDB GitHub Repository" target="_blank")
*   [Official KeyDB Documentation](https://docs.keydb.dev "Official KeyDB Documentation" target="_blank")
*   [KeyDB Docker Image](https://hub.docker.com/r/eqalpha/keydb "KeyDB Docker Image" target="_blank")
*   [Join the KeyDB Slack Community](https://docs.keydb.dev/slack/ "Join the KeyDB Slack Community" target="_blank")
*   [KeyDB Project Roadmap](https://docs.keydb.dev/docs/coming-soon "KeyDB Project Roadmap" target="_blank")