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Backing Up and Restoring Novell eDirectory
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However, in this disaster situation, Delores and her team do not have the roll-forward logs. Without
the roll-forward logs, only one server in a replica ring can be restored without errors—the first one
they restore. For the rest of the servers, the restore verification process will fail because the
synchronization states don't match what the other servers expect (see
“Transitive Vectors and the
Restore Verification Process” on page 435
). If the restore verification fails, the restore process will
not activate the restored eDirectory database.
Delores and her team anticipated this, and they have planned for it. They use the two DSMASTER
servers as a starting point, which gives them only one replica of each partition.Those servers can be
restored without verification errors, and then the replicas they hold can be used as masters to be
copied onto all the other servers.
After restoring the DSMASTER servers, restoring the rest of the servers requires some extra steps.
Delores and her team must restore each of the remaining servers by doing the following:
Making sure that the replicas on the DSMASTER servers are designated as master replicas.
Removing all the servers except the DSMASTER servers from the replica rings.
Restoring the full and incremental backups for each of the other servers.
Delores and her team know that the restore verification process will fail for the rest of the
servers, because they could not use roll-forward logs in the restore for any of the servers. This
leaves them with a restored database that is not activated.
Activating the restored database, but keeping it locked, using advanced restore options
Using DSREPAIR to change all the replica information to external references.
Unlocking the restored database.
At this point the server has the same identity it did before but it will not try to synchronize
replica information. Instead, it is prepared to receive a new copy of the replicas it held before.
For NetWare servers, Delores and her team make sure that the file system restore takes place
after eDirectory is restored.
Adding the replicas back on to each server by replicating them from the copy on the
DSMASTER server.
Delores and her team have a pretty good idea which replicas were held by each server, but they
can read the header of the backup files for each server to see a list of the replicas that were on
the server at the time of the last backup.
Re-creating the roll-forward log configuration after the servers are back on line (since the
restore turns it off and resets the settings to the default), and creating a new full backup as a
baseline to prepare for any other failures that might happen before the next unattended full
backup is scheduled.
(These steps are explained in more detail in
Section 16.9, “Recovering the Database If Restore
Verification Fails,” on page 477
.)
Delores and her team have a lot of work to do, but they can get the tree itself up relatively quickly,
and they can expect to recover the eDirectory identity for all of their servers.
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