valkey-io/valkey

Valkey is a high-performance distributed key-value database optimized for caching and real-time workloads, written primarily in C. The project was forked from the open source Redis project immediately before Redis transitioned to new source available licenses. Valkey serves as a flexible alternative that maintains compatibility with Redis while operating under different licensing terms.

The core functionality of Valkey centers on providing a data structure server that handles key-value workloads efficiently. It supports a wide range of native data structures and includes an extensible plugin system that allows developers to add new data structures and access patterns. The system is designed to deliver high performance for caching scenarios and other real-time applications where fast data access is critical.

Valkey demonstrates broad platform support, compiling successfully on Linux, macOS, OpenBSD, NetBSD, and FreeBSD across both big-endian and little-endian architectures, supporting both 32-bit and 64-bit systems. The build system offers extensive customization options, including TLS support that can be compiled as either a built-in feature or as a module, experimental RDMA support for high-performance networking, systemd integration, and optional Lua engine inclusion. The project also supports an experimental CMake build system alongside its traditional Makefile approach.

The repository includes comprehensive testing infrastructure with separate test suites for unit tests, module API tests, Sentinel integration tests, and Cluster integration tests. Performance monitoring is a priority, with Valkey Performance Dashboards providing consolidated views of throughput trends across versions and an Unstable Branch Dashboard tracking performance metrics for all commits in the development branch.

The project provides detailed build documentation covering dependency management, memory allocator selection between libc and jemalloc, monotonic clock configuration using processor instruction clocks for improved performance, and troubleshooting guidance for 32-bit builds. Installation options range from simple binary installation to production-ready setup scripts for Ubuntu and Debian systems that configure init scripts and configuration files.

Valkey maintains Redis compatibility through symlinks created during installation, allowing existing Redis tools and workflows to function with Valkey binaries. The repository is classified across multiple security and technology domains including encryption, key management, authentication, data protection, and blockchain-related categories, reflecting its use in security-sensitive applications and its relevance to modern distributed systems architecture.