- Usage:
-
REPLICAOF 〈 host port | no one 〉
- Complexity:
- O(1)
- Since:
- 5.0.0
The REPLICAOF command can change the replication settings of a replica on the fly.
If a Valkey server is already acting as replica, the command REPLICAOF NO ONE will turn off the replication, turning the Valkey server into a PRIMARY. In the proper form REPLICAOF hostname port will make the server a replica of another server listening at the specified hostname and port.
If a server is already a replica of some primary, REPLICAOF hostname port will stop the replication against the old server and start the synchronization against the new one, discarding the old dataset.
The form REPLICAOF NO ONE will stop replication, turning the server into a MASTER, but will not discard the replication. So, if the old primary stops working, it is possible to turn the replica into a primary and set the application to use this new primary in read/write. Later when the other Valkey server is fixed, it can be reconfigured to work as a replica.
Examples
> REPLICAOF NO ONE
"OK"
> REPLICAOF 127.0.0.1 6799
"OK"