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Novell eDirectory 8.8 Administration Guide
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3.4.1 Features of Synchronization
Synchronization in eDirectory
• Is
transitive
.
• Maintains
object transaction model
.
• Has timestamps like
transitive vector
,
local received up to
and
remote received up to
.
Transitive Synchronization
Synchronization in eDirectory is transitive. This means that eDirectory synchronizes the changes to
the data without requiring the eDirectory agent to directly contact and synchronize those changes
with every other agent in the replica ring.
Figure 3-3
Transitive Synchronization
For example, if you make a change to data on Server 1, the change is synchronized from Server 1 to
Server 2 and from Server 2 to Server 3. Even if Server 1 could not come into direct contact with
Server 3, because of a problem in communication, it still receives the latest change to the data,
Can happen between eDirectory 8.8 servers or
across servers hosting earlier versions of
eDirectory.
Happens only between eDirectory 8.8 servers,
holding the same partition.
Never fails due to its feature.
For more information, refer to
Section 3.4.1,
“Features of Synchronization,” on page 106
.
If priority sync fails, the modifications to the critical
data are synchronized through normal
synchronization.
For more information, refer to
“When Can Priority
Sync Fail?” on page 115
.
Normal Synchronization or Replica Synchronization Priority Sync
Server 1
eDirectory agent
Server 3
eDirectory agent
Server 2
eDirectory agent
Communication
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