FoundationDB is an open source distributed database developed by Apple that functions as a transactional key-value store designed to manage large volumes of structured data across clusters of commodity servers. Written primarily in C++, it organizes data as an ordered key-value store and applies ACID transactions to all operations, making it particularly well-suited for read/write workloads while also delivering strong performance for write-intensive scenarios. Users interact with the database through API language bindings, with the project supporting multiple programming languages through a comprehensive binding system.
The most frequently labeled issues fall into categories of good first issue, operations, and bug reports, indicating an organized approach to issue triage and community contribution.
FoundationDB's release strategy reflects a mature production database with multiple supported branches. Version 7.3.69 represents the current supported production release, while version 7.1.57 receives bug fixes and version 6.3.25 is marked unsupported. The project provides clear upgrade paths for users running older releases, with tested migration sequences such as 6.2.X to 6.3.25 to 7.1.57 to 7.3.69. Binary packages are available for multiple operating systems, and the project supports compilation from source on Linux, macOS, FreeBSD, and Windows platforms.
The build infrastructure relies on CMake version 3.24.2 or higher, Mono, and Ninja, with the project recommending the official foundationdb/build Docker image as the primary compilation method due to extensive dependencies. Local compilation requires at least 8GB of memory, with additional memory needed for parallel builds. The codebase uses the flow language, an extension of C++ that provides coroutine support and transpiles to standard C++ through the actorcompiler tool. This design choice predates C++20 standardization and requires special IDE configuration considerations.
Development practices include automated code quality enforcement through clang-format and clang-tidy running on every pull request, with developers encouraged to run these tools locally before submission. The project provides compilation database support through CMAKE_EXPORT_COMPILE_COMMANDS for integration with development tools like CCLS and CQuery, enabling code completion and navigation capabilities.
Documentation is maintained within the repository and published at apple.github.io/foundationdb, covering API usage, design philosophy, and practical examples. Community discussion occurs on dedicated forums at forums.foundationdb.org, with the project maintaining a Code of Conduct to establish community standards. The project welcomes contributions to the codebase, community forums, and dependent projects built on FoundationDB.
