Am I missing something, or would using 'DERIVE' as a DS type deal with this ? -- Unsubscribe mailto:rrd-users-request at list.ee.ethz.ch?subject=unsubscribe Help mailto:rrd-users-request at list.ee.ethz.ch?subject=help Archive http://lists.ee.ethz.ch/rrd-users WebAdmin http://lists.ee.ethz.ch/lsg2.cgi