Reconfiguring Cluster

[Leslie Fischer]

Want to change the MAX_CONFIGURED_PACKAGES from 3 to 8 on an existing running cluster.

The steps I am going to use are as follows:
# cmhaltcl -f -v

# cmgetconf -C cmclconfig.ascii

# vi cmclconfig
and change line
MAX_CONFIGURED_PACKAGES 8

# cmcheckconf -v -C /etc/cmcluster/cmclconfig.config

# cmapplyconf -k -v -C /etc/cmcluster/cmclconfig.config

# cmruncl -v

Since the cluster is existing and the nodes are already down, is there any reason I would have to do a vgchange if I am not changing any volume groups? If I am making a change to the cluster configuration, do I need to make sure that the cluster lock is active on the node where I am running the commands or run any addition commands? Still new at this. Thanks..

[Mel Burslan · Accepted solution]

when you shut the cluster down properly prior to engaging the modification activity you should not worry about volume group activation or vglock disk active/deactivated condition as cmcheckconf and cmapplyconf verifies the referenced components of the cluster in the cluster definition file and will not let you proceed with a non-working cluster.

[Stephen Doud]

cmcheckconf & cmapplyconf only apply rules related to the modifications detected in the cluster binary file. Since the only thing you are changing is the MAX_CONFIGURED_PACKAGES, the only rule those commands will need to enforce is that the cluster is halted when cmapplyconf is performed.

[Leslie Fischer]

Thanks for the replies. Leslie