Hi Florian, many months ago I wrote down some thoughts on a design for this http://oss.oetiker.ch/rrdtool-trac/wiki/RRDaccelerator the idea was to have rrdtool use such a daemon transparently ... cheers tobi -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902