In an HA setup,
any command issued on the primary node propagates automatically to, and is
executed on, the secondary before it is executed on the primary. If command
propagation fails, or if command execution fails on the secondary, the primary
node executes the command and logs an error. Command propagation uses port
In an HA pair
configuration, command propagation is enabled by default on both the primary
and secondary nodes. You can enable or disable command propagation on either
node in an HA pair. If you disable command propagation on the primary node,
commands are not propagated to the secondary node. If you disable command
propagation on the secondary node, commands propagated from the primary are not
executed on the secondary node.
reenabling propagation, remember to force synchronization.
occurs while you are disabling propagation, any configuration-related changes
that you make before the disabling of propagation takes effect are synchronized
with the secondary node. This is also true for cases where propagation is
disabled while synchronization is in progress.