Stale Follower, Three Anomalies

Stale Follower, Three Anomalies A sequence diagram generated by Archify. write profile=v7 ACK at LSN 7 replicate LSN 7 A applies at once replicate LSN 7 B still at LSN 5 read profile v5, not v7 own write invisible read profile again v7 same query, other replica third read v5 again time moved backward read reply@7 reply visible question still missing on B: answer before question 1 read-your-writes 2 monotonic reads 3 causal order Client · writes, then reads · Sequence participant Client writes, then reads Leader · applies at LSN 7 · Sequence participant Leader applies at LSN 7 Follower A · caught up at LSN 7 · Sequence participant Follower A caught up at LSN 7 Follower B · lagging at LSN 5 · Sequence participant Follower B lagging at LSN 5 Legend main request return async trace message