Linux Clustering With Csm and Gpfs

6.8 Backing up CSM

CSM stores information in the following directories on the management server:

• CSM Configuration Data: /etc/opt/csm

• CSM Runtime Data: /var/opt/csm

• RMC Data: /var/ct

Additional user customizable files are located in /opt/csm/install. We recommend that these are backed up as well.

Note that by default, /cfmroot is a symlink to /etc/opt/csm/cfmroot. If you have a lot of data in /cfmroot, your CSM backup may be large.

In order to back up /var/ct, the RMC subsystems must be shutdown. The recommended procedure to back up the CSM configuration is to run the following on the management node:

1. Stop the RMC subsystems:

   # /usr/sbin/rsct/bin/rmcctrl -z

2. Back up all CSM data related directories:

   # tar -czvf csm-backup-20031119.tar.gz -C / etc/opt/csm var/opt/csm var/ct opt/csm/install

3. Restart the RMC subsystems:

   # /usr/sbin/rsct/bin/rmcctrl -s

These files should be backed up periodically and after any significant change to the CSM configuration.

Additionally, you may choose to save a copy of your nodedef file to ease re-installation of CSM. If you did not save a nodedef file when you created the nodes, you can generate one from the CSM database by running:

# lsnode -F