Red Hat DIRECTORY SERVER 8.0, Administration Manual

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Replication Agreement
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on the supplier server. It is called the supplier bind DN because it is the entry which the
supplier uses to bind to the consumer. This entry actually exists, then, on the consumer.
For more information on creating the replication manager entry, see
Section 8.3, “Creating the
Supplier Bind DN Entry”
.
8.1.6. Replication Agreement
Directory Servers use replication agreements to define their replication configuration. A replication
agreement describes replication between
one
supplier and
one
consumer only. The agreement is
configured on the supplier server and must specify all required replication information:
• The database to be replicated.
• The consumer server to which the data is pushed.
• The days and times during which replication can occur.
• The DN and credentials that the supplier server must use to bind (the replication manager entry or
supplier bind DN).
• How the connection is secured (SSL, client authentication).
• Any attributes that will not be replicated (fractional replication).
8.1.7. Replicating Attributes with Fractional Replication
Fractional replication sets a specific subset of attributes that will not be transmitted from a supplier to
the consumer. Administrators can therefore replicate a database without replicating all the information
that it contains or all of the information in every entry.
Fractional replication is enabled and configured per replication agreement. Excluding attributes from
replication is applied equally to all entries within the replication agreement's scope.
As far as the consumer server is concerned, the excluded attributes always have no value. Therefore,
a client performing a search against the consumer server will never see the excluded attributes.
Similarly, should it perform a search that specifies those attributes in its filter, no entries will match.
WARNING
Fractional replication can only be performed where the consumer is a read-only replica
(dedicated consumer). This condition is enforced when the supplier server initiates a
replication connection to the consumer, not when the agreement is created. It is therefore
possible to create a fractional replication agreement on a supplier that will fail later when
the supplier attempts to contact the consumer. This failure is logged in the supplier's error
log.
8.1.8. Compatibility with Earlier Versions of Directory Server
The replication mechanism in Directory Server 8.0 is different from the mechanism used in 4.x of
Directory Server. Compatibility is provided through two Directory Server plug-ins: