Load Balancing With Replication in Large Deployments

If your deployment requires a Number of hosts significantly larger than 16, you might need to add dedicated consumers to the topology.

The following figure assumes that the Number of hosts is 24 and, for simplicity, shows only a portion of the topology. (The remaining 12 servers would have an identical configuration, with a total of 8 masters and 16 consumers.

Figure 10–3 Using Multi-Master Replication for Load Balancing in a Large Deployment

A change log can be enabled on any of these consumers if you need to do the following:

• Promote the consumer to a master in the event of an outage

• Perform a binary initialization from a master to any one of the consumers

If the Number of hosts is several hundred, you might want to add hubs to the topology. In such a case, the number of hubs must be an order of magnitude above the number of masters. For example, if your topology requires 200 consumers, you should use approximately 10 hubs and each hub should handle replication to only 20 consumers.

No topology should have the same number of hubs as masters, or the same number of hubs as consumers.