The mmrefresh command

The mmrefresh command is intended for use by experienced system administrators who know how to collect data and run debugging routines.

Use the mmrefresh command only when you suspect that something is not working as expected and the reason for the malfunction is a problem with the GPFS configuration data. For example, a mount command fails with a device not found error, and you know that the file system exists. Another example is if any of the files in the /var/mmfs/gen directory were accidentally erased. Under normal circumstances, the GPFS command infrastructure maintains the cluster data files automatically and there is no need for user intervention.

The mmrefresh command places the most recent GPFS cluster configuration data files on the specified nodes. The syntax of this command is:


mmrefresh [-f] [ -a | -N {Node[,Node...] | NodeFile | NodeClass}]

The -f flag can be used to force the GPFS cluster configuration data files to be rebuilt whether they appear to be at the most current level or not. If no other option is specified, the command affects only the node on which it is run. The remaining flags have the same meaning as in the mmshutdown command, and are used to specify the nodes on which the refresh is to be performed.

For example, to place the GPFS cluster configuration data files at the latest level, on all nodes in the cluster, issue:


mmrefresh -a