Chapter 8. Managing Replication

5. Configuring Multi-Master Replication

This section provides information on configuring multi-master replication. In a multi-master configuration, many suppliers can accept updates, synchronize with each other, and update all consumers. The consumers can send referrals for updates to all masters.

Directory Server supports 4-way multi-master replication. To set up multi-master replication such as the configuration shown in Figure 8.3, “Multi-Master Replication (Four Masters)”, set up all of the consumers first, then set up the suppliers, and last, initialize all of the databases:

Section 5.1, “Configuring the Read-Write Replicas on the Supplier Servers”

Section 5.2, “Configuring the Read-Only Replicas on the Consumer Servers”

Section 5.3, “Setting up the Replication Agreements”

Section 5.4, “Preventing Monopolization of the Consumer in Multi-Master Replication”

TIP

More than 10 databases running with replication or more than 20 replication agreements on a supplier can cause performance degradation. To support that many consumers, introduce hub replicas between the suppliers and consumers. See Section 6, “Configuring Cascading Replication”.

5.1.Configuring the Read-Write Replicas on the Supplier Servers

Set up each supplier server. The first supplier configured should be used to initialize the other suppliers in the multi-master replication environment.

1.Specify the supplier settings for the server.

a.In the Directory Server Console, select the Configuration tab.

b.In the navigation tree, select the Replication folder.

c.In the right-hand side of the window, select the Supplier Settings tab.

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HP UX Red Hat Direry Server Software manual Configuring Multi-Master Replication