private static String createEmptyDataDir(String name, String... subPath) {
        String dataDir = dataDir(name);
        IOUtils.recursiveDeleteDir(new File(dataDir));
        String path = Stream.concat(Stream.of(dataDir), Arrays.stream(subPath))
                            .collect(Collectors.joining("/"));
        IOUtils.createDirectory(path);
        return dataDir;
    }
To update data for the manual test above
node-repository/src/test/java/com/yahoo/vespa/hosted/provision/autoscale/QuestMetricsDbTest.java