Figure 9-12 Server topology for Example Corp. International's extranet

The hub servers replicate data to two consumer servers in each of the data centers in Europe, the US and Asia.

9.2.5 Multinational enterprise replication design

Example Corp. considers the following points when designing replication for its directory:

•Data will be managed locally.

•The quality of network connections varies from site to site.

•Database links will be used to connect data on remote servers.

•Hub servers that contain read-only copies of the data will be used to replicate data to consumer servers.

The hub servers are located near important directory-enabled applications such as a mail server or a web server.

Hub servers remove the burden of replication from the supplier servers, so the supplier servers can focus on write operations. In the future, as Example Corp. expands and needs to add more consumer servers, the additional consumers do not affect the performance of the supplier servers.

For more information on hub servers, see “Cascading replication”.

9.2.5.1 Supplier architecture

For the Example Corp. intranet, each locality stores the master copy of its data and uses database links to chain to the data of other localities. For the master copy of its data, each locality uses a multi-master replication architecture.

The following diagram illustrates the supplier architecture for Europe, which includes the dc=example, dc=com and dc=com information:

9.2 Design example: A multinational enterprise and its extranet 137

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HP UX Direry Server Multinational enterprise replication design, Server topology for Example Corp. Internationals extranet
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UX Direry Server specifications

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One of the key features of HP UX Directory Server is its ability to handle large directories with significant volumes of data. Built on a highly optimized architecture, it provides excellent performance and can support millions of entries without sacrificing speed or reliability. This capability makes it an ideal choice for large-scale deployments in enterprises that require high availability and responsiveness.

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