检查是否在HDFS目录为空或不

Question

是否有HDFS任何命令检查目录是否为空或不

Answer 1

count：

hdfs dfs -count /path 
      1   0     0 /path 

输出列：DIR_COUNT, FILE_COUNT, CONTENT_SIZE, PATHNAME

du：

hdfs dfs -du -s /path 
0 /path 

如果有0字节文件或空目录，结果仍然是0。

Answer 2

isEmpty=$(hdfs dfs -count /some/path | awk '{print $2}') 
if [[ $isEmpty -eq 0 ]];then 
    echo "Given Path is empty" 
    #Do some operation 
else 
    echo "Given Path is not empty" 
    #Do some operation 
fi