delete_cleanup_interval         (duration)  set to change intervals when deleted objects are permanently deleted from ".trash" folder (default: '5m')
odirect                         (boolean)   set to enable or disable O_DIRECT for writes under special conditions. NOTE: do not disable O_DIRECT without prior testing (default: 'on')
root_access                     (boolean)   turn 'off' root credential access for all API calls including s3, admin operations (default: 'on')

**In our tests we also found ext4 does not honor POSIX O_DIRECT/Fdatasync semantics, ext4 trades performance for consistency guarantees. Please avoid ext4 in your setup.**