title: How can I be sure that data is distributed evenly across the hadoop nodes?
body: <p>If I copy data from local system to HDFS, сan I be sure that it is distributed evenly across the nodes?</p>
  
  <p>PS HDFS guarantee that each block will be stored at 3 different nodes. But does this mean that all blocks of my files will be sorted on same 3 nodes? Or will HDFS select them by random for each new block?</p>