Backing Up and Restoring Novell eDirectory
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• If the logs are turned off or lost, turn them back on, then do a new full backup
to ensure
that you can make a full recovery. This is necessary in these cases:
• After a restore. Roll-forward logging is turned off and the settings are reset to the default
as part of the restore process.
• If you lose the directory containing the roll-forward logs because of a storage device
failure or other failure.
• If roll-forward logs are unintentionally turned off.
• If you turn on logging of stream files, the roll-forward logs use up disk space more
quickly.
When logging of stream files (such as login scripts) is turned on, the whole stream
file is copied into the roll-forward log every time there is a change. You can slow the growth of
the log files by turning off roll-forward logging of stream files and, instead, back them up only
when you do an incremental or full backup.
• The slowest part of restoring the database is replaying the roll-forward logs.
Roll-forward
logs grow larger based on how many changes are made to the tree structure and whether stream
files (such as login scripts) are being logged.
If your database changes often, you might need to consider more frequent eDirectory backups
so that fewer changes need to be replayed from roll-forward logs during a restore.
• Don't change the name of a roll-forward log file.
If the filename is different than when the
log was created, the log file can't be used in a restore.
• Keep in mind that removing eDirectory also removes all the roll-forward logs.
If you want
to be able to use the logs for restoring in the future, before removing eDirectory you must first
copy the roll-forward logs to another location.
• If a restore is necessary, make sure you re-create the roll-forward logs configuration on
the server after the restore is complete
to make sure they are turned on and are placed in a
fault-tolerant location. After turning on the roll-forward logs, you must also do a new full
backup.
This step is necessary because during a restore, the configuration for roll-forward logging is set
back to the default, which means that roll-forward logging is turned off and the location is set
back to the default. The new full backup is necessary so that you are prepared for any failures
that might occur before the next unattended full backup is scheduled to take place.
14.3.2 Location of the Roll-Forward Logs
If you turn on roll-forward logging, you should change the location of the roll-forward log directory
to a different storage device than eDirectory.
Here are the important issues to consider when choosing the location:
• Don't leave them in the default location—make sure you put them on a different storage
device than eDirectory.
This way, if eDirectory is lost because of a storage device failure, you
can still access the roll-forward logs to restore eDirectory.
For example, on NetWare the default location is
sys:_netware\nds.rfl\
. However, if
you turn on roll-forward logging, you should not use the default location. The logs should not
be placed on volume sys: because that is the same volume where the eDirectory database is
located.
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