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Diffstat (limited to 'iredis/data/commands/cluster-replicate.md')
| -rw-r--r-- | iredis/data/commands/cluster-replicate.md | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/iredis/data/commands/cluster-replicate.md b/iredis/data/commands/cluster-replicate.md new file mode 100644 index 0000000..ab5cf5c --- /dev/null +++ b/iredis/data/commands/cluster-replicate.md @@ -0,0 +1,29 @@ +The command reconfigures a node as a replica of the specified master. If the +node receiving the command is an _empty master_, as a side effect of the +command, the node role is changed from master to replica. + +Once a node is turned into the replica of another master node, there is no need +to inform the other cluster nodes about the change: heartbeat packets exchanged +between nodes will propagate the new configuration automatically. + +A replica will always accept the command, assuming that: + +1. The specified node ID exists in its nodes table. +2. The specified node ID does not identify the instance we are sending the + command to. +3. The specified node ID is a master. + +If the node receiving the command is not already a replica, but is a master, the +command will only succeed, and the node will be converted into a replica, only +if the following additional conditions are met: + +1. The node is not serving any hash slots. +2. The node is empty, no keys are stored at all in the key space. + +If the command succeeds the new replica will immediately try to contact its +master in order to replicate from it. + +@return + +@simple-string-reply: `OK` if the command was executed successfully, otherwise +an error is returned. |