PowerHA; Import flash copy of VG? Post: 302913220

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Operating Systems AIX PowerHA; Import flash copy of VG? Post 302913220 by j_aix on Thursday 14th of August 2014 02:24:39 PM

08-14-2014

Registered User

Quote:

Originally Posted by bakunin

Interesting. This should not be the case. I remove volumes and change volume groups actually all the time, in 6.x-clusters as well as in 7.x-clusters. To have one disk remain constant in a VG and do "learning import" (importvg -L) on the other node is usually all it takes.

I usually even replace disks completely by: adding the new disk, mirror, importvg on the passive node, then unmirror, reducevg, another importvg on the passive node. Not even a takeover or application touchdown is necessary that way.

You're probably right, I think removing the cluster definition wouldn't have been necessary had I known it was the Fc adapter holding onto the volume. Of course in the process of narrowing it down it just turned out to be the way I did it. Since it was the only physical volume in the VG (and concurrent) I felt it was the safest way to go about it.

For my scenario I will need to do this (redefine the cluster) anyway due to a complete IP schema change. I may even try out the cluster snapshot feature going forward. Thanks again for the follow-up!

j_aix

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LEARN ABOUT CENTOS

crm_node

PACEMAKER(8)						  System Administration Utilities					      PACEMAKER(8)

NAME

       Pacemaker - Part of the Pacemaker cluster resource manager

SYNOPSIS

       crm_node command [options]

DESCRIPTION

       crm_node - Tool for displaying low-level node information

OPTIONS

       -?, --help
	      This text

       -$, --version
	      Version information

       -V, --verbose
	      Increase debug output

       -Q, --quiet
	      Essential output only

   Stack:
       -A, --openais
	      Only try connecting to an OpenAIS-based cluster

       -H, --heartbeat
	      Only try connecting to a Heartbeat-based cluster

   Commands:
       -n, --name
	      Display the name used by the cluster for this node

       -N, --name-for-id=value
	      Display the name used by the cluster for the node with the specified id

       -e, --epoch
	      Display the epoch during which this node joined the cluster

       -q, --quorum
	      Display a 1 if our partition has quorum, 0 if not

       -l, --list
	      Display all known members (past and present) of this cluster (Not available for heartbeat clusters)

       -p, --partition
	      Display the members of this partition

       -i, --cluster-id
	      Display this node's cluster id

       -R, --remove=value
	      (Advanced) Remove the (stopped) node with the specified name from Pacemaker's configuration and caches

       In the case of Heartbeat, CMAN and Corosync 2.0, requires that the node has already been removed from the underlying cluster

   Additional Options:
       -f, --force

AUTHOR

       Written by Andrew Beekhof

REPORTING BUGS

       Report bugs to pacemaker@oss.clusterlabs.org

Pacemaker 1.1.10-29.el7 					     June 2014							      PACEMAKER(8)