Memory speed.
Disk truth.Client Write→In-Memory Engine→Batch Journal(100ms)→Durable Storage
Write path
Client
Agent issues SET command via RESP3
Hot Cache
Journal
Disk
Stage: Client · 0ms
Durability modes
Three paths. You choose.
Asyncdefault
0.1ms writeSync
2-5ms writeNone
0.05ms writeRecovery
Crash? Resume.
Load the latest snapshot. Replay the journal. Verify integrity. Serve. Recovery completes in 50–500ms depending on WAL size.
20ms
Snapshot load
30–480ms
Journal replay
< 1ms
Integrity check
Fast enough for memory. Safe enough for disk.
Three modes. Per-database selection. Zero configuration beyond the purpose.