title: How can a smallfiles setting for journaling save disk space?
body: <p>We are going to upgrade to mongdb 2.4.6 server with in a week .
  I am really worried about the default <strong>journaling</strong> option set to true on 64 bit machines  considering the size of the <strong>journal</strong> files would be created (as our application is  more of write bound) .</p>
  
  <p>My question is that even though i enable <strong>smallfiles = true</strong> option , how really this can reduce the disk space ( As in my view instead of a 1 GB journal  file , it wil create equavalent  many 128 bytes small journal  files ) </p>
  
  <p>Is it that this <strong>smallfiles=true</strong> is only applicable only  during mongo server start up ?? and nothing related to saving of disk space ??</p>
  
  <p>Please let me know if i myunderstaning is wrong , or else please how a smallfiles setting true will help ??</p>