MW_RSYNC_ARGS: '--delay-updates' & '--compress'

--delay-updates :
   This option causes rsync to stage all changes on the target
   node by copying to a temporary location and then renaming
   files into place all at once. This should minimize the amount
   of time each sync target is in an inconsistent state, making
   scap more atomic.

   The staged files are placed into a directory named ".~tmp~" in
   each file's destination director.

--compress :
   Exactly what it sounds like.

Change-Id: If27387fbbc8b71689e5c7388d8666f006ab1b33e