title: What does stage mean in the spark logs?
body: <p>When I run a job using spark I get the following logs?</p>
  
  <p><code>[Stage 0:&gt;                (0 + 32) / 32]</code></p>
  
  <p>Here 32 corresponds to the number of partitions of rdd that I have asked for.</p>
  
  <p>However I am not getting why are there multiple stages and what exactly happens in each stage.</p>
  
  <p>Each stage apparently takes a lot of time. Is it possible to get done in fewer stages?</p>