public boolean isWithinAdvertisedDiskLimits(NodeResources requested, ClusterSpec cluster) {
        if (requested.diskIsUnspecified() || requested.memoryIsUnspecified()) return true;
        // Override disk limit to be able to use more flavors as content nodes
        return requested.diskGb() >= minAdvertisedDiskGb(requested, cluster, 2.9);
    }
Validates the resources applications ask for (which are in "advertised" resource space)
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/provisioning/NodeResourceLimits.java