appropriate for the environment. These basic scenarios can be combined to build the replication topology that best suits the network environment.

•“Single-master replication”

•“Multi-master replication”

•“Cascading replication”

•“Mixed environments”

6.2.1Single-master replication

In the most basic replication configuration, a supplier server copies a replica directly to one or more consumer servers. In this configuration, all directory modifications occur on the read-write replica on the supplier server, and the consumer servers contain read-only replicas of the data.

The supplier server must perform all modifications to the read-write replicas stored on the consumer servers. This is illustrated below.

Figure 6-1 Single-master replication

The supplier server can replicate a read-write replica to several consumer servers. The total number of consumer servers that a single supplier server can manage depends on the speed of the networks and the total number of entries that are modified on a daily basis. However, a supplier server is capable of maintaining several consumer servers.

6.2.2 Multi-master replication

In a multi-master replication environment, master copies of the same information can exist on multiple servers. This means that data can be updated simultaneously in different locations. The changes that occur on each server are replicated to the other servers. This means that each server functions as both a supplier and a consumer.

When the same data is modified on multiple servers, there is a conflict resolution procedure to determine which change is kept. The Directory Server considers the valid change to be the most recent one.

76 Designing the replication process

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HP UX Direry Server manual Single-master replication, Multi-master replication
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UX Direry Server specifications

HP UX Directory Server is a robust and scalable solution designed for managing directory information within enterprise networks. Developed by Hewlett-Packard (HP), this server offers an extensive set of features tailored to meet the needs of organizations that require an efficient way to store, manage, and retrieve identity and access data.

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.

In addition to its scalability, HP UX Directory Server supports a wide range of protocols, including LDAP (Lightweight Directory Access Protocol), which ensures seamless integration with diverse applications and systems across various platforms. The server maintains standards compliance, which facilitates interoperability and simplifies administration tasks.

Security is a top priority for HP UX Directory Server, offering an array of features to protect sensitive information. It supports secure data transmission via TLS/SSL protocols, ensuring encrypted communication between clients and servers. Advanced access controls allow administrators to define fine-grained permissions, helping to safeguard directory data against unauthorized access.

Another salient feature of HP UX Directory Server is its replication capabilities. The server can replicate directory data across multiple instances, ensuring data consistency and availability in distributed environments. This feature is essential for businesses operating across different geographical locations or requiring failover solutions for disaster recovery.

HP UX Directory Server also comes equipped with tools for data management, including an intuitive administration console for configuring and monitoring the server. Additionally, it offers customizable schema capabilities, enabling organizations to tailor the directory structure to fit their specific needs.

Integration with existing identity management solutions is streamlined through connectors and APIs, allowing organizations to extend their directory services and enhance user experience.

In summary, HP UX Directory Server is a powerful directory management solution that combines scalability, security, and integration flexibility. Its support for industry standards, advanced replication, and comprehensive administrative tools makes it an essential asset for organizations seeking to manage identity and access efficiently. By leveraging this technology, businesses can improve their operational efficiency and ensure a secure and organized approach to directory management.
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