[Freeswitch-users] fallback url in xml_cdr ?

I'm building a cluster with a couple of freeswitch nodes. (I'll try and write it up when I'm done). I'm pleased with the way that freeSWITCH lets me set a fallback url for xml_curl getting the dialplan which is used when the 'primary' config engine isn't working. I am now looking for an equivalent fallback for xml_cdr. Is there a way to give a secondary url in xml_cdr.conf.xml ? Thanks. Tim.