@Override
    public void getConfig(StorFilestorConfig.Builder builder) {
        if (getHostResource() != null && ! getHostResource().realResources().isUnspecified()) {
            builder.num_threads(Math.max(4, (int)getHostResource().realResources().vcpu()));
        }
        cluster.getConfig(builder);
    }
Whether this node is configured as retired, which means all content should migrate off the node
config-model/src/main/java/com/yahoo/vespa/model/content/StorageNode.java