2026.08.05simpleconf: A Go Config Service for When etcd Is Too Much11 min read simpleconf write path in Raft mode Four stages from an incoming PUT to the append-only log, with the alternative outcome at each stage on the right. One write, Raft mode reads never take this path — they are served locally from memory PUT /db/product.name 1 · am I the leader? no → re-issue to leader http_addr forward: false → 409 not leader 2 · raft.Apply(cmd) quorum commit across peers no quorum → error 3 · every FSM applies sjson.Set on the in-memory string client sees 200 here 4 · append to data.aof separate goroutine · no fsync after the response Steps 3 and 4 are decoupled: the acknowledgement means “applied in memory”, not “on disk”.
