Planning for the minimal downtime upgrade


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Plan out the movement of the service groups from node to node in order to minimize the downtime for any particular service group.
Some rough guidelines are:
- Split the cluster in half. If the cluster has an odd number of nodes, calculate (n+1)/2, and start the upgrade with the even number of nodes.
- Split the cluster so that your high priority service groups remain online during the upgrade of the first subcluster.