PRIMECLUSTER Global File Services Configuration and Administration Guide 4.1 (Linux)

9.5.2.2 Changing the MDS placement range

Specify the MDS placement range using the number of nodes from the first node in the shared host list specified at file system creation.

• Check the current file system configuration. "all" is currently displayed to confirm that the MDS placement range includes all nodes.

# sfcinfo -n /dev/sfdsk/gfs/dsk/volume1
/dev/sfdsk/gfs/dsk/volume1:
FSID  hostID    status  hostname
   1  80000000  STOP    mikan
   1  80000001  STOP    karin
   1  80000002  STOP    mango
   1  80000003  STOP    ringo
# sfcinfo -c /dev/sfdsk/gfs/dsk/volume1
/dev/sfdsk/gfs/dsk/volume1:
node=mikan,karin,mango,ringo
mdsnode=all

• Change the MDS placement range from all nodes to three nodes (mikan, karin, and mango).

# sfcadm -c 3 /dev/sfdsk/gfs/dsk/volume1

• Confirm that the MDS placement range has been changed.

# sfcinfo -c /dev/sfdsk/gfs/dsk/volume1
/dev/sfdsk/gfs/dsk/volume1:
node=mikan,karin,mango