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Chapter 8. Managing Replication
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8.10.1. When to Initialize a Consumer
Consumer initialization involves copying data from the supplier server to the consumer server. Once
the subtree has been physically placed on the consumer, the supplier server can begin replaying
update operations to the consumer server.
Under normal operations, the consumer should not ever have to be reinitialized. However, any time
there is a chance that there is a big discrepancy between the supplier's data and the consumer's,
reinitialize the consumer. For example, if the data on the supplier server is restored from backup, then
all consumers supplied by that server should be reinitialize. As another example, if the supplier has
not been able to contact the consumer for a long time, like a week, the supplier may determine that the
consumer is too far out of date to be updated, and must be reinitialized.
The consumer can either be initialized online using the Console or manually using the command-line.
Online consumer initialization using the Console is an effective method of initializing a small number
of consumers. However, since each replica is initialized in sequence, this method is not suited to
initializing a large number of replicas. Online consumer initialization is the method to use when the
consumer is initialized as part of configuring the replication agreement on the supplier server.
Manual consumer initialization using the command-line is a more effective method of initializing a large
number of consumers from a single LDIF file.
8.10.2. Online Consumer Initialization Using the Console
Online consumer initialization using the Console is the easiest way to initialize or reinitialize a
consumer. However, for replicating across a slow link, this process can be very time-consuming, and
manual consumer initialization using the command-line may be a more efficient approach. This is
described in more detail
Section 8.10.4, “Manual Consumer Initialization Using the Command Line”
.
NOTE
When a consumer server is being initialized using the online consumer creation method,
all operations (including searches) on the replica are referred to the supplier server until
the initialization process is completed.
To initialize or reinitialize a consumer online, do the following:
1. Create a replication agreement.
2. On the supplier server, on the Directory Server Console, select the
Configuration
tab.
3. Expand the
Replication
folder, then expand the replicated database. Right-click the replication
agreement, and choose
Initialize Consumer
from the pop-up menu.
A message opens warning that any information already stored in the replica on the consumer will
be removed.
4. Click
Yes
in the confirmation box.
Online consumer initialization begins immediately. To check the status of the online consumer
initialization, open the
Summary
tab in the
Status
box. If online consumer initialization is in progress,
the status shows that a replica is being initialized.