They may want to look at how collectd handles updates to RRD files.<p><a href="http://collectd.org/wiki/index.php/Inside_the_RRDtool_plugin" rel="nofollow">http://collectd.org/wiki/index.php/Inside_the_RRDtool_plugin</a><p><a href="http://collectd.org/documentation/manpages/collectd.conf.5.shtml#plugin_rrdtool" rel="nofollow">http://collectd.org/documentation/manpages/collectd.conf.5.s...</a>