Automatic backup of the GPFS cluster data

This topic describes the procedure for automatically backing up the cluster data in IBM Storage Scale.

The IBM Storage Scale provides an exit, mmsdrbackup, that can be used to automatically back up the IBM Storage Scale configuration data every time it changes. To activate this facility, follow these steps:
  1. Modify the IBM Storage Scale-provided version of mmsdrbackup as described in its prologue, to accomplish the backup of the mmsdrfs file however the user desires. This file is /usr/lpp/mmfs/samples/mmsdrbackup.sample.
  2. Copy this modified mmsdrbackup.sample file to /var/mmfs/etc/mmsdrbackup on all of the nodes in the cluster. Make sure that the permission bits for /var/mmfs/etc/mmsdrbackup are set to permit execution by root.

The IBM Storage Scale system invokes the user-modified version of mmsdrbackup in /var/mmfs/etc every time a change is made to the mmsdrfs file. This action performs the backup of the mmsdrfs file according to the user's specifications. For more information on GPFS user exits, see GPFS user exits.