public NodeResources totalResources() {
        // XXX no GPU here?
        return nodeResources.withVcpu(nodeResources.vcpu() * nodes)
                            .withMemoryGiB(nodeResources.memoryGiB() * nodes)
                            .withDiskGb(nodeResources.diskGb() * nodes)
                            .withBandwidthGbps(nodeResources.bandwidthGbps() * nodes);
    }
Returns the total resources of this, that is the number of nodes times the node resources
config-provisioning/src/main/java/com/yahoo/config/provision/ClusterResources.java