File Size

 File Size :

1.

• You can use the Hadoop fs -ls command to list files in the current directory as well as their details. 
• The 5th column in the command output contains file size in bytes.
• For example, command Hadoop fs -ls input gives the following output :

    Found 1 item

    -rw-r--r--   1  hduser    supergroup   45956  2020-07-8   20:57   /user/hduser/input/sou

 The size of the file sou is 45956 bytes.

2.

• You can also find file size using hadoop fs -dus <path>. 
• For example, if a directory on HDFS named "/user/frylock/input" contains 100 files and you need the total size for all of those files you could run:

        hadoop fs -dus /user/frylock/input

• And you would get back the total size (in bytes) of all of the files in the "/user/frylock/input" directory.

3.

• You can also use the following function to find the file size :
  public class GetflStatus
  {
  public long getflSize(String args) throws IOException, FileNotFoundException
  {
  Configuration config = new Configuration();
  Path path = new Path(args);
  FileSystem hdfs = path.getFileSystem(config);
  ContentSummary cSummary = hdfs.getContentSummary(path);
  long length = cSummary.getLength();
  return length;
  }
  }