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The "engine" of KeyDB is built on the same foundation as Redis but introduces a .

active-replica yes

: KeyDB utilizes Multi-Version Concurrency Control (MVCC) to allow background tasks and queries to run on database snapshots without blocking the main execution path. keydb eng

The most common misconception is that KeyDB simply adds threading to Redis. Redis 6.0 introduced threaded I/O (reading/writing network sockets in parallel), but the core command execution remained single-threaded. KeyDB takes the radical step of making both . The "engine" of KeyDB is built on the