GPFS: Administration and Programming Reference - IRA Home

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Security
You must have root authority to run the mmcrvsd command.
You may issue the mmcrvsd command from any node in the GPFS cluster.
When using the rcp and rsh commands for remote communication, a properly configured .rhosts file must
exist in the root user’s home directory, on each node in the GPFS cluster. If you have designated the use
of a different remote communication program on either the mmcrcluster or the mmchcluster command,
you must ensure:
1. Proper authorization is granted to all nodes in the GPFS cluster.
2. The nodes in the GPFS cluster can communicate without the use of a password, and without any
extraneous messages.
Examples
To create a virtual shared disk with the descriptor file vsdesc containing:
hdisk2:k145n01:k145n02:dataOnly:4
hdisk3:k145n06::dataAndMetadata:5:ABC
These descriptors translate as:
Disk Name hdisk2
Server Name k145n01
Backup Server Name k145n02
Disk Usage dataOnly
Failure Group 4
Desired Name Name defaults to gpfs20vsd
and
Disk Name hdisk3
Server Name k145n06
Backup Server Name none
Disk Usage dataAndMetadata
Failure Group 5
Desired Name ABC
The low level components of the virtual shared disk gpfs20vsd are created:
gpfs20gvg global volume group
gpfs20lv local logical volume
gpfs20vg local volume group
The low level components of the virtual shared disk ABC are created:
ABCgvg global volume group
ABClv local logical volume
ABCvg local volume group
mmcrvsd Command
Chapter 8. GPFS commands 137