As the memory and CPU requirements for the services provided by the File System Manager may conflict with the needs of some applications, you may need to manage which node is assigned as the File System Manager.
You can display the File System Manager node by issuing the mmlsmgr command. You can display the information for an individual file system, a list of file systems, or for all of the file systems in the nodeset. For example, to display the File System Manager for the file system fs1, enter:
mmlsmgr fs1
The output shows the device name of the file system and the File System Manager's node number and name, in parenthesis, as they are registered in the GPFS cluster data:
File System Manager Node ------------- ----------------------------------- /dev/fs1 1 (k145n30)
See the mmlsmgr Command for complete usage information.
You can change the File System Manager node for an individual file system by issuing the mmchmgr. For example, to change the File System Manager node for the file system fs1, to k145n32, enter:
mmchmgr fs1 k145n32
The output shows the File System Manager's node number and name, in parenthesis, as registered in the GPFS cluster data:
MMFS: 6027-628 Sending migrate request to current manager node 1 (k145n30) MMFS: 6027-629 Node 1 (k145n30) resigned as manager for /dev/fs1 MMFS: 6027-630 Node 3 (k145n32) appointed as manager for /dev/fs1
See the mmchmgr Command for complete usage information.