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Operating Systems AIX Difference between concurrent and enhanced concurrent VG Post 302922618 by igalvarez on Monday 27th of October 2014 10:41:32 AM
Old 10-27-2014
enhanced concurrent VGs are mostly used on hacmp/powerHA systems. In a two node system, this VG works active for one node and passive for the other. All changes made on LVs on node1 are update on node2 (lazzy update)..

concurrent VGs can not be shared with teo or more nodes..

A good explanation is here:

http: //unix.ittoolbox.com/groups/technical-functional/ibm-aix-l/concurrent-and-enhanced-concurrent-vgs-4089500
 

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cmsync(1m)																cmsync(1m)

NAME
cmsync - Synchronize files or directories on multiple Serviceguard nodes. SYNOPSIS
cmsync [-rv] [[-n node_name]...] [src_node:]src_file [...] DESCRIPTION
cmsync copies files and/or directories to multiple Serviceguard nodes. cmsync is limited in several ways. cmsync is best suited for situations where other remote copy facilities are not available. For a more full featured tool for copying files between Serviceguard nodes, see ccp(1m) provided by Distributed Systems Administration Utilities. To use this command, the local user must have the root access role on each of the involved nodes. For more information on Serviceguard access control policies, see the manual, Managing Serviceguard. To use the cmsync command without specifying -n options, the local node must be configured into a Serviceguard cluster. If no -n options are specified, the files will be copied to all available nodes in the cluster. Paths may be relative to the current working directory or specified absolutely. Copies between two remote hosts are permitted. If a file or directory already exists on a destination node, the destination node's copy will be overwritten with no prompting. The cmsync command is not suited for large files or large numbers of files and may result in a heavy load on the command and Serviceguard daemons. Other tools such as ccp should be considered for these purposes. Options And Arguments -r Recursively copy entire directories. -v Verbose output will be displayed. -n node_name Serviceguard node to copy file to. If no -n options are specified, default is to copy to all nodes within the configured clus- ter. src_node Serviceguard node to retrieve the file from. Defaults to the local node. src_file Path to source file on src_node. RETURN VALUE
cmsync returns the following values: 0 Successful completion. 1 Command failed. EXAMPLES
Copy the local file /etc/hosts to remote nodes node1 and node2 cmsync -n node1 -n node2 /etc/hosts Distribute the remote file /etc/passwd to all nodes in the cluster. cmsync node1:/etc/passwd AUTHOR
cmsync was developed by HP. SEE ALSO
ccp(1m), cmcp(1m), cmexec(1m), cmdo(1m), cmquerycl(1m), cmviewcl(1m) Requires Optional Serviceguard Software cmsync(1m)
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