OpenDJ lets you backup and restore your data either in compressed, binary format, or in LDAP Data Interchange Format. This chapter shows you how to backup and to restore OpenDJ data from archives, and explains portability of backup archives, as well as backing up server configuration information.

Backup A bak/ directory is provided when you install OpenDJ, as a location to save binary backups. When you create a backup, the bak/backup.info contains information about the archive. Archives produced by the backup command contain backups only of the directory data. Backups of server configuration are found in config/archived-configs/. To perform online backup, you start backup as a task by connecting to the administrative port and authenticating as a user with the backend-backup privilege, and also setting a start time for the task by using the --start option. To perform offline backup when OpenDJ is stopped, you run the backup command without connecting to the server, authenticating, or requesting a backup task. Use one of the following alternatives. Back up only the database for Example.com, where the data is stored in the backend named userRoot. The following example requests an online backup task that starts immediately, backing up only the userRoot backend. $ backup --port 4444 --bindDN "cn=Directory Manager" --bindPassword password --backendID userRoot --backupDirectory /path/to/opendj/bak --start 0 Backup task 20110613143715983 scheduled to start Jun 13, 2011 2:37:15 PM CEST Stop the server to back up Example.com data offline. The following example stops OpenDJ, runs offline backup, and starts the server after backup has completed. $ stop-ds Stopping Server... [13/Jun/2011:14:31:00 +0200] category=BACKEND severity=NOTICE msgID=9896306 msg=The backend userRoot is now taken offline [13/Jun/2011:14:31:00 +0200] category=CORE severity=NOTICE msgID=458955 msg=The Directory Server is now stopped $ backup --backendID userRoot -d /path/to/opendj/bak [13/Jun/2011:14:33:48 +0200] category=TOOLS severity=NOTICE msgID=10944792 msg=Starting backup for backend userRoot [13/Jun/2011:14:33:48 +0200] category=JEB severity=NOTICE msgID=8847446 msg=Archived: 00000000.jdb [13/Jun/2011:14:33:48 +0200] category=TOOLS severity=NOTICE msgID=10944795 msg=The backup process completed successfully $ start-ds ... The Directory Server has started successfully Back up all user data on the server. The following example requests an online backup task that starts immediately, backing up all backends. $ backup --port 4444 --bindDN "cn=Directory Manager" --bindPassword password --backUpAll --backupDirectory /path/to/opendj/bak --start 0 Backup task 20110613143801866 scheduled to start Jun 13, 2011 2:38:01 PM CEST You can schedule online data backup using crontab format. Back up all user data every night at 2 AM, and notify diradmin@example.com when finished, or on error. $ backup --port 4444 --bindDN "cn=Directory Manager" --bindPassword password --backUpAll --backupDirectory /path/to/opendj/bak --recurringTask "00 02 * * *" --completionNotify diradmin@example.com --errorNotify diradmin@example.com Recurring Backup task BackupTask-988d6adf-4d65-44bf-8546-6ea74a2480b0 scheduled successfully

Backup Restoring From backup When you restore data, the procedure to follow depends on whether the OpenDJ directory server is replicated. To restore OpenDJ when the server is online, you start a restore task by connecting to the administrative port and authenticating as a user with the backend-restore privilege, and also setting a start time for the task by using the --start option. To restore data when OpenDJ is stopped, you run the restore command without connecting to the server, authenticating, or requesting a restore task. Use one of the following alternatives. Stop the server to restore data for Example.com. The following example stops OpenDJ, restores data offline from one of the available backups, and then starts the server after the restore is complete. $ stop-ds Stopping Server... [13/Jun/2011:15:44:06 +0200] category=BACKEND severity=NOTICE msgID=9896306 msg=The backend userRoot is now taken offline [13/Jun/2011:15:44:06 +0200] category=CORE severity=NOTICE msgID=458955 msg=The Directory Server is now stopped $ restore --backupDirectory /path/to/opendj/bak --listBackups Backup ID: 20110613080032 Backup Date: 13/Jun/2011:08:00:45 +0200 Is Incremental: false Is Compressed: false Is Encrypted: false Has Unsigned Hash: false Has Signed Hash: false Dependent Upon: none $ restore --backupDirectory /path/to/opendj/bak --backupID 20110613080032 [13/Jun/2011:15:47:41 +0200] category=JEB severity=NOTICE msgID=8847445 msg=Restored: 00000000.jdb (size 341835) $ start-ds ... The Directory Server has started successfully Schedule the restore as a task to begin immediately. The following example requests an online restore task, scheduled to start immediately. $ restore --port 4444 --bindDN "cn=Directory Manager" --bindPassword password --backupDirectory /path/to/opendj/bak --backupID 20110613080032 --start 0 Restore task 20110613155052932 scheduled to start Jun 13, 2011 3:50:52 PM CEST Replication Restoring from backup After you restore a replica from backup, replication brings the replica up to date with changes that happened after you created the backup. In order to bring the replica up to date, replication must apply changes that happened after the backup was made. Replication uses internal change log records to determine what changes to apply. Internal change log records are not kept forever, though. Replication is configured to purge the change log of old changes, preventing the log from growing indefinitely. Yet, for replication to determine what changes to apply to a restored replica, it must find change log records dating back at least to the last change in the backup. In other words, replication can bring the restored replica up to date as long as the change log records used to determine which changes to apply have not been purged. Therefore, when you restore a replicated server from backup, make sure the backup you use is newer than the last purge of the replication change log (default: 3 days). If all your backups are older than the replication purge delay, do not restore from a backup, but instead initialize a new replica as described in Initializing Replicas. Restore the server database from the backup archive that you are sure is newer than the last purge of the replication change log. $ stop-ds Stopping Server... [13/Jun/2011:15:44:06 +0200] category=BACKEND severity=NOTICE msgID=9896306 msg=The backend userRoot is now taken offline [13/Jun/2011:15:44:06 +0200] category=CORE severity=NOTICE msgID=458955 msg=The Directory Server is now stopped $ restore --backupDirectory /path/to/opendj/bak --listBackups Backup ID: 20110613080032 Backup Date: 13/Jun/2011:08:00:45 +0200 Is Incremental: false Is Compressed: false Is Encrypted: false Has Unsigned Hash: false Has Signed Hash: false Dependent Upon: none $ restore --backupDirectory /path/to/opendj/bak --backupID 20110613080032 [13/Jun/2011:15:47:41 +0200] category=JEB severity=NOTICE msgID=8847445 msg=Restored: 00000000.jdb (size 341835) $ start-ds ... The Directory Server has started successfully