Understanding Novell eDirectory
53
n
ov
do
cx (e
n)
22
Ju
n
e 20
09
1.5.2 Distributing Replicas for Performance
In the preceding example, suppose that Server1 holds replicas of both the Tree partition and the
Finance partition. At this point, you haven’t gained any performance advantage from eDirectory
because Server1 still holds the entire directory (replicas of both partitions).
To gain the desired performance advantage, you need to move one of the replicas to a different
server. For instance, if you move the Tree partition to Server2, then Server2 holds all objects in the
Tree and YourCo containers. Server1 holds only objects in the Finance and Accounts containers.
The load on both Server1 and Server2 is less than it would be with no partitioning.
1.5.3 Partitions and WAN Links
Suppose your network spans two sites, a North site and a South Site, separated by a WAN link.
Three servers are at each site.
Figure 1-16
Sample eDirectory Containers
eDirectory performs faster and more reliably in this scenario if the directory is divided in two
partitions.
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 54
solves performance and reliability
problems over the WAN link.
Summary of Contents for EDIRECTORY 8.8 SP5
Page 4: ...4 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 72: ...72 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 118: ...118 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 130: ...130 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 188: ...188 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 222: ...222 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 240: ...240 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 264: ...264 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 290: ...290 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 322: ...322 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 540: ...540 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 548: ...548 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
Page 616: ...616 Novell eDirectory 8 8 Administration Guide novdocx en 22 June 2009...
