canonical/raft

A fully asynchronous C implementation of the Raft consensus protocol, originally developed by Canonical's dqlite team. The library features a modular design: a platform-independent core implementing the Raft algorithm logic, and a pluggable I/O interface for networking (send/receive RPC messages) and disk persistence (store log entries and snapshots). A stock I/O implementation based on libuv is provided, though it currently requires Linux due to its use of the Linux AIO API for disk I/O. The implementation includes all basic Raft features (leader election, log replication, log compaction, membership changes) plus optional enhancements such as optimistic pipelining, parallel writing to the leader's disk, automatic stepping down, leadership transfer, and a pre-vote protocol. The project is now archived and unmaintained; the source code has been incorporated into canonical/dqlite as a private implementation detail, and users are advised to switch to the maintained fork cowsql/raft.