title: How to create large file (require long compress time) on Linux
body: <p>I make parallel job now So I'm trying to create  dummyFile and compreaa that on the backgrounds.
  Like this </p>
  
  <p>Create dummy file </p>
  
  <pre><code>for in ()
   do 
         Compress that file &amp;
  done
  wait
  </code></pre>
  
  <p>I need to create dummy data So I tried </p>
  
  <pre><code>fallocate -l 1g test.txt
  </code></pre>
  
  <p>And</p>
  
  <pre><code>tar cfv test.txt
  </code></pre>
  
  <p>But this compress job is done just 5seconds</p>
  
  <p>How can I create dummydata big and required long compress time (3minute~5minute)</p>