Cluster 6.1 storage move Post: 302949019

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Operating Systems AIX Cluster 6.1 storage move Post 302949019 by bakunin on Monday 6th of July 2015 05:38:34 AM

07-06-2015

Registered User

Quote:

Originally Posted by snchaudhari2

The plan that our architect implemented in summary is :
shutdown the source servers,
replicate the old luns with new luns,
remove the old luns and allocate new luns.
Bring the servers up.

The problem with this plan is:

1. the new LUNs will have different WWNs and therefore the volume group information of the system will not be consistent. Basically you will have to build the cluster resources anew.

2. You need a (complete) downtime to do this as your storage guy planned. What i described will need no downtime at all. To reconfigure all the VGs and RGs plan at least 1-2 hours (30 min to actually do it, 30-90 min in contingency) and you will not know if everything went well until you do an "extended verification and synchronisation". (Technically speaking, you will be creating new VGs, which just happen to have the same name as the old ones and you will build new ressource groups from them, which happen to have the same name as the old ones.)

I hope this helps.

bakunin

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LEARN ABOUT LINUX

clinfo

clinfo(1M)						  System Administration Commands						clinfo(1M)

NAME

       clinfo - display cluster information

SYNOPSIS

       clinfo [-nh]

DESCRIPTION

       The clinfo command displays cluster configuration information about the node from which the command is executed.

       Without	arguments, clinfo returns an exit status of 0 if the node is configured and booted as part of a cluster. Otherwise, clinfo returns
       an exit status of 1.

OPTIONS

       The following options are supported:

       -h	Displays the highest node number allowed to be configured. This is different from the maximum number of nodes supported in a given
		cluster. The current highest configured node number can change immediately after the command returns since new nodes can be dynam-
		ically added to a running cluster.

		For example, clinfo -h might return 64, meaning that the highest number you can use to identify a node is 64. See the Sun  Cluster
		3.0 System Administration Guide for a description of utilities you can use to determine the number of nodes in a cluster.

       -n	Prints the number of the node from which clinfo is executed.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion.

       1	An error occurred.

		This is usually because the node is not configured or booted as part of a cluster.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

SunOS 5.10							    12 Mar 2002 							clinfo(1M)