createTarEntry(METADATA_PATH, output.size(), UnixPermissions.FILE_FLAG | UnixPermissions.DEFAULT_FILE_PERM, tarOutput);
        tarOutput.write(output.toByteArray());
        tarOutput.closeArchiveEntry();
    }

    private long pack(CacheableEntity entity, Map<String, ? extends FileSystemSnapshot> snapshots, TarArchiveOutputStream tarOutput) {
        AtomicLong entries = new AtomicLong();