- Usage:
-
SLAVEOF 〈 host port | no one 〉
- Complexity:
- O(1)
- Since:
- 1.0.0
A note about the word slave used in this man page and command name: If not for Redis OSS compatibility, the Valkey project does not use the word slave. Please use the new command REPLICAOF
. The command SLAVEOF
will continue to work for backward compatibility.
The SLAVEOF
command can change the replication settings of a replica on the fly.
If a Valkey server is already acting as replica, the command SLAVEOF
NO ONE will
turn off the replication, turning the Valkey server into a MASTER.
In the proper form SLAVEOF
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 master, SLAVEOF
hostname port will stop
the replication against the old server and start the synchronization against the
new one, discarding the old dataset.
The form SLAVEOF
NO ONE will stop replication, turning the server into a
MASTER, but will not discard the replication.
So, if the old master stops working, it is possible to turn the replica into a
master and set the application to use this new master in read/write.
Later when the other Valkey server is fixed, it can be reconfigured to work as a
replica.