title: HDFS block size and replication
body: <p>I have a file called employee.txt.The size of that  file is 66 MB.</p>
  
  <p>We know that default HDFS block size is 64 MB.</p>
  
  <p>So, There is going to be two blocks for employee.txt as the size of it is greater than 64 MB </p>
  
  <p>employee.txt = block A + block B</p>
  
  <p>So, There are two blocks.</p>
  
  <p>For block A it is 64 MB,So there is no problem at all ..</p>
  
  <p>For block B it is 2 MB, So what will happen to the reamining 62 MB of block B.Does it kept as empty?</p>
  
  <p>I would like to know what happens to that unoccupied space  for block B.</p>