Replication Overview; Read-Write Replica/Read-Only Replica - Red Hat DIRECTORY SERVER 7.1 - ADMINISTRATOR Administrator's Manual

Replication Overview

For conceptual information on how you can use replication in your directory
deployment, see the Red Hat Directory Server Deployment Guide.
Replication Overview
Replication is the mechanism by which directory data is automatically copied
from one Directory Server to another. Updates of any kind — entry additions,
modifications, or even deletions — are automatically mirrored to other Directory
Servers using replication. This section contains information on the following
replication concepts:
•

Read-Write Replica/Read-Only Replica

• Supplier/Consumer
• Changelog
• Unit of Replication
• Replication Identity
• Replication Agreement
• Compatibility with Earlier Versions of Directory Server
Read-Write Replica/Read-Only Replica
A database that participates in replication is defined as a replica. There are two
kinds of replicas: read-write or read-only. A read-write replica contains master
copies of directory information and can be updated. A read-only replica refers all
update operations to read-write replicas. A server can hold any number of
read-only or read-write replicas.
302 Red Hat Directory Server Administrator's Guide • May 2005