an object pointing to where data is or will be stored for the 'ddf' object - can be a 'kvConnection' object created from localDiskConn or hdfsConn, or a data frame or list of key-value pairs
update
should the attributes of this object be updated? See updateAttributes for more details.
reset
should all persistent metadata about this object be removed and the object created from scratch? This setting does not effect data stored in the connection location.
control
parameters specifying how the backend should handle things if attributes are updated (most-likely parameters to rhwatch in RHIPE) - see rhipeControl and localDiskControl