title: Split big object before persisting it to file
body: <p>I have an object that occupies approximately 15GB in my java app's heap, and I need to keep it persistent between JVM restarts. I use ObjectOutputStream's writeObject method to write it to file on the disk every time interval. Since the writing process is very long (a few minutes) and causes some GC issues, I would like to split the object somehow to persist each part separately to a different file and not in a single action to a single file. 
  Is there a way to do this (and of course to retrieve it back from the files when I need it)?</p>
  
  <pre><code>        FileOutputStream fos = null;
          GZIPOutputStream gos = null;
          ObjectOutputStream oos = null;
          try {
              fos = new FileOutputStream("some_path");
              gos = new GZIPOutputStream(fos);
              oos = new ObjectOutputStream(gos);
              oos.writeObject(myLargeObject);
              oos.flush();
              gos.close();
              fos.close();
          } catch (Exception e) {
              e.printStackTrace();
          }
  </code></pre>