Replication in Managed Service for Redis
Managed Service for Redis uses native Redis replication.
Replication
Managed Service for Redis clusters use asynchronous replication, i.e., the result of a write request is committed to the master host, which then forwards the data to the cluster replicas. The replication process does not affect the master availability in any way, but it can make replicas temporarily unavailable (for up to a few seconds for large databases) when loading new data into memory.
Since the replication is asynchronous, the data on replicas may be out of date: while a replica is processing updates from the master, it continues sending the existing data in response to requests, as the replica-serve-stale-datayes
.
For more information about how replication works in Redis, read the relevant documentation