To maintain the directory data on the JE back end, the directory server provides efficient backup and restore utilities that support full and incremental backups. A full backup saves the directory data files in the environment as a compressed archive file. An incremental backup saves and compresses just those files that have been written since the previous backup, together with a list of names of files that are unchanged since the previous backup. The directory server stores its backup information in a backup back end for easy restores.
Directory server backups also can be made on the local disks or on remote disks, for example, on network-attached storage (NAS). If you run a backup locally, you should then copy and store the backup on a different machine or file system for security purposes.
Before you start backing up and restoring data, consider the following:
You must design a workable backup and restore strategy for your directory services system. For example, you can run an incremental backup daily and perform a full backup at least once a week. Test your backup process and your ability to restore regularly. For data restores, many companies restore a directory server from a replicated server, which ensures that the most update copy of the directory data is used. Backup tapes are still needed if the directory data is damaged (for example, missing entries) and the corrupted data has been replicated to other servers.
Ensure that you have a disaster recovery plan in place. Disaster recovery is necessary when catastrophic events, data corruption, or data tampering occurs. Companies devise their own plans or out source the work to third party specialists. See Backing Up for Disaster Recovery for more information.
Ensure that you have a place to store your back ups. Store the archived data, configuration directory, schema subdirectory, and installation directory used for your server together in a single location. All these items are required when you restore the server.