Replication between clusters with a backup channel
The previous recipe showed how to connect a MySQL Cluster to another MySQL server or another MySQL Cluster using a single replication channel. Obviously, this means that this replication channel has a single point of failure (if either of the two replication agents {machines} fail, the channel goes down).
If you are designing your disaster recovery plan to rely on MySQL Cluster replication, then you are likely to want more reliability than that. One simple thing that we can do is run multiple replication channels between two clusters. With this setup, in the event of a replication channel failing, a single command can be executed on one of the backup channel slaves to continue the channel.
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