@Override
    public boolean cp(final String sourceLocation, final String targetLocation) {
        try {
            return FileUtil.copy(this.fs, new Path(sourceLocation), this.fs, new Path(targetLocation), false, new Configuration());
        } catch (final IOException e) {
            throw new IllegalStateException(e.getMessage(), e);
        }
    }
@param pattern refers directory or a set of files
@return a non-null array of the files and directories the pattern refers as of {@link Storage#ls(String)}
hadoop-gremlin/src/main/java/org/apache/tinkerpop/gremlin/hadoop/structure/io/FileSystemStorage.java