Details on configuring the special Continentalclusters control scripts are in Chapters 3, 4, and 5. Some additional notes are provided below.
Multiple Recovery Pairs in Continentalclusters
One or more than one recovery pair can be configured in Continentalclusters. In the Continentalclusters configuration that contains more than one recovery pair, more than one primary cluster is configured to share a common recovery cluster. Similar to the one recovery pair per Continentalclusters configuration, mutual recovery can also be configured in a multiple recovery pair scenario, as shown in Figure 14. The common recovery cluster can choose any one of the primary clusters as its recovery cluster.
Data replication needs to be setup to allow for copying data from each primary cluster to the common recovery cluster. Each recovery pair should have its own data replication link. Different storage areas need to be configured with the common recovery cluster to receive data replicated from each primary clusters. The common recovery cluster should have enough capacity to serve the recovery purpose for all of the primary clusters configured to partner with it in a recovery pair.
Figure 14 Multiple Recovery Pair Configuration in Continentalclusters
Highly Available Wide Area Networking
Disaster tolerant networking for Continentalclusters is directly tied to the data replication method. In addition to the reliability of the redundant lines connecting the remote nodes, it is important to consider what bandwidth is needed to support the data replication method that has been chosen.
The Continentalclusters that handles a high number of write transactions per minute will not only require a highly available network, but also one with a large amount of bandwidth. Details on highly available networking can be found in Chapter 1, in the section titled “Disaster Tolerant Architecture Guidelines.” White papers describing specific implementations are also available at:
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