Managing PowerHA SystemMirror file collections
PowerHA® SystemMirror® requires that event scripts, application scripts, AIX® files, and PowerHA SystemMirror configuration files must be identical on each cluster node.
The PowerHA SystemMirror File Collections facility automatically synchronizes these files among cluster nodes and warns you if there are any unexpected results (for example, if one or more files in a collection has been deleted or has a length of zero on one or more cluster nodes).
PowerHA SystemMirror has always provided the facilities to keep its own configuration information in sync across the cluster. The value of the PowerHA SystemMirror file collections function is that it allows you to easily keep application-specific configuration information in sync on all the nodes in the cluster. It is known that when the application-specific configuration information is allowed to drift out of sync in the cluster - when a change made one node is not made on others - this creates problems during application fallovers. You can use file collections to keep your application configuration identical on all cluster nodes.