HP-UX Directory Server 8.1 deployment guide

Figure 6-8 Combined multi-master and cascading replication
6.3 Defining a replication strategy
The replication strategy is determined by the services that must be provided. To determine the
replication strategy, start by performing a survey of the network, users, applications, and how
they use the directory service.
• Assess the resources within the network, the traffic loads, and resource requirements for
the directory service.
See “Conducting a replication survey”, “Replication resource requirements”, and “Managing
disk space required for multi-master replication”.
• If there are multiple consumers for different locations or sections of the company or if some
servers are insecure, then use fractional replication to exclude sensitive or seldom-modified
information to maintain data integrity without compromising sensitive information.
See “Replicated selected attributes with fractional replication” for more information.
• If the network is stretched across a wide geographical area, there are multiple Directory
Servers at multiple sites, with local data masters connected by multi-master replication.
See “Replication across a wide-area network” for more information.
• If high availability is the primary concern, create a data center with multiple Directory
Servers on a single site. Single-master replication provides read-failover, while multi-master
replication provides write-failover.
See “Using replication for high availability” for more information.
• If local availability is the primary concern, use replication to distribute data geographically
to Directory Servers in local offices around the world. A master copy of all information can
82 Designing the replication process