public static int getBlockNum(String path) throws IOException{
		String pwdPath = CloudServer.serverRoot + "pwd/" + path;
		
		File fp = new File(pwdPath);
		FileReader fr = new FileReader(fp);
		BufferedReader br = new BufferedReader(fr);
		int line = 0;
		while(br.readLine() != null){
			++line;
		}
		br.close();
		return (line);
	}