Novell EDIRECTORY 8.8 SP3, Руководство администратора, Страница: 277 / 634

Repairing the Novell eDirectory Database 277
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11.6.6 Declaring a New Schema Epoch
An epoch is an instant in time that is arbitrarily selected as a point of reference. It is synonymous
with era or new version. Epochs control the synchronization of replicas. When a new epoch is
declared, it begins on the master replica. Other replicas cannot send updates to a replica with a
newer epoch, but they receive updates from it until they become fully synchronized with it.
When other replicas of a given partition are synchronized with the updated replica, meaning that
each replica’s epoch is the same, bidirectional synchronization is allowed again.
When you declare a new schema epoch, the master replica of the [Root] partition is contacted and
illegal time stamps are repaired on the schema records. A new epoch for the schema is then declared
on that server, but it affects the entire tree.
All other servers receive a new copy of the schema including the repaired time stamps.
If the receiving server contains a schema that was not in the new epoch, objects and attributes that
use the old schema are changed to the Unknown object class or attribute.
IMPORTANT: Do not perform this operation unless instructed to do so by Novell Support.
1
In Novell iManager, click the Roles and Tasks button Description: Roles and Tasks button .
2 Click eDirectory Maintenance Utilities > Schema Maintenance .
3 Specify the server that will perform the operation, then click Next .
4 Specify a user name, password, and context for the server where you will perform the
operation, then click
Next .
5 Click Declare a New Epoch , then click Next .
6 Follow the online instructions to complete the operation.
11.7 Repairing Server Network Addresses
The Server Repair Wizard lets you repair all server network addresses in replica rings and Server
objects in the local database. You can also repair a selected server's network address in replica rings
and Server objects in the local database.
Use the Server Repair Wizard to perform the following operations:
Š
“Repairing All Network Addresses” on page 277
Š
“Repairing a Server's Network Addresses” on page 278
11.7.1 Repairing All Network Addresses
This operation checks the network address for every server in the local eDirectory database. It
searches the SAP tables, the SLP directory agent, and DNS local or remote information, depending
on the transport protocol available, for each server’s name.
Each address is then compared to the eDirectory Server object’s Network Address attribute and the
address record in each Replica attribute of every partition [Root] object. If the addresses are
different, they are updated to be the same.