Understanding Novell eDirectory
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With a single partition, the replicas are either kept at one site or distributed between the two sites.
This proves unwieldy for two reasons:
If all replicas are kept on servers at the North site, for example, users at the South site encounter
delays when logging in or accessing resources. If the link goes down, users at the South site
can’t log in or access resources at all.
If replicas are distributed between sites, users can access the directory locally. However, server-
to-server synchronization of replicas happens over the WAN link, so there can be eDirectory
errors if the link is unreliable. Any changes to the directory are slow to propagate across the
WAN link.
The two-partition solution shown in
Figure 1-17 on page 53
solves performance and reliability
problems over the WAN link.
Figure 1-17
Sample Partitions
Replicas of the Tree partition are kept on servers at the North site. Replicas of the South partition are
kept on servers at the South site, as shown in
Figure 1-18
.
Figure 1-18
Sample Partitions, Severs, and Replicas
For each site, the objects that represent local resources are kept locally. Synchronization traffic
among servers also happens locally over the LAN, rather than over the slow, unreliable WAN link.
eDirectory traffic is generated over the WAN link, however, when a user or administrator accesses
objects at a different site.
Summary of Contents for EDIRECTORY 8.8 SP2
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