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425Administering cluster functionality
Administering VxVM in cluster environments
can join two private disk groups on any cluster node where those disk groups are
imported.
If the source disk group and the target disk group are both shared, you must
perform the join on the master node.
Note: You cannot join a private disk group and a shared disk group.
Changing the activation mode on a shared disk group
Note: The activation mode for access by a cluster node to a shared disk group is
set on that node.
The activation mode of a shared disk group can be changed using the following
command:
# vxdg -g diskgroup set activation=mode
The activation mode is one of exclusivewrite or ew, readonly or ro,
sharedread or sr, sharedwrite or sw, or off.
If you use this command to change the activation mode of a shared disk group,
you must first change the activation mode to off before setting it to any other
value, as shown here:
# vxdg -g myshdg set activation=off
# vxdg -g myshdg set activation=readonly
See “Activation modes of shared disk groups” on page 402.
Setting the disk detach policy on a shared disk group
Note: The disk detach policy for a shared disk group can only be set on the
master node.
The
vxdg command may be used to set either the global or local disk detach
policy for a shared disk group:
# vxdg -g diskgroup set diskdetpolicy=global|local
The default disk detach policy is global.
See “Connectivity policy of shared disk groups” on page 404.