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If you only have one storage device on your server, the roll-forward logs can't provide fault
tolerance for eDirectory in case of a storage device failure. In this case, you probably should
not use the roll-forward logs.
You can change the location of the roll-forward logs using Backup Configuration in iManager
or setconfig in the eMBox Client. The roll-forward logs directory must be local to the server.
• Document the location.
Document where the roll-forward logs are placed so that you can find
them when you need to restore the database on a server. It’s important to do this while the
server is healthy, before any failures happen.
To find out the location when the server is healthy, you can look it up in iManager in Backup
Configuration, or in the eMBox Client using the backup getconfig option. But if the server has
a failure that affects eDirectory (such as hardware failure), you won't be able to look up the
location of the roll-forward logs.
If the server has already had a failure and you are trying to restore it, keep in mind that any new
installations of eDirectory will show the default location of the roll-forward logs. So, if you
have just reinstalled eDirectory as the first step of a restore process, eDirectory will not show
the correct location of the roll-forward logs on the server before it went down. You will need to
refer to your documentation to find out where they are.
The settings for the roll-forward logs are also recorded in the _ndsdb.ini file, but that file is on
the same disk partition/volume as eDirectory, so if you were to lose the storage device where
eDirectory was located, you couldn't use the
_ndsdb.ini
file to look up the location.
• Restrict rights to where the roll-forward logs are located.
This is a security issue. The
information is not easily readable, but the logs could be decoded to reveal sensitive data.
• Monitor the amount of free disk space to make sure there is enough.
See
“Backing Up and
Removing Roll-Forward Logs” on page 392
.
• A good strategy is to set up a disk partition/volume solely for the roll-forward logs.
This
way, disk space and security privileges can be easily monitored.
• The last directory in the path is created by eDirectory.
It is based on the name of the current
eDirectory database.
For example, if the location you specified was
d:\Novell\NDS\DIBFiles
and your
eDirectory database was currently named NDS, the location of the roll-forward logs would be
d:\Novell\NDS\DIBFiles\nds.rfl
. If you renamed the database from NDS to ND1,
the roll-forward log directory would be changed to
d:\Novell\NDS\DIBFiles\nd1.rfl
.
When you change the location, the new directory is created immediately, but a roll-forward log
is not created there until a transaction takes place in the database.
• When restoring, all the necessary roll-forward logs must be in the same directory.
For
more information, see
Section 14.4, “Preparing for a Restore,” on page 393
.
14.3.3 Backing Up and Removing Roll-Forward Logs
If left unchecked, roll-forward logs can fill up the disk partition/volume where they are placed. If
roll-forward logs cannot be created because no more disk space is available, eDirectory stops
responding on that server. We recommend that you periodically back up the log files and remove
unused logs from the server to free up disk space.
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